True. I was just thinking the other day of how much his camera presence has improved. Something people may not notice if they are just consuming the content.
ATRAC is always the answer. It IS a brake locking differential. We've tried to get ATRAC to get "stuck" on our GX460 and have yet to get it stuck... very excellent system and I will say superior to "traditional lockers"... 👏
@@petrnemecek4379 naw, ATRAC is better. Locker will have 25% to each wheel. ATRAC will send nearly 50% to 1 wheel if the other looses traction. On a locker if 1 wheel goes in the air the max the other wheel will get is 25% power..
So why isn't the normal traction control system as aggressive as A-trac? In other words, why do you have to turn A-trac on instead of that just being how it always works?
@@4x4.tests.on.rollers Fair point, but in those situations I assume you'd want to turn off traction control entirely. What I can't figure out is why you'd ever want traction control on, but only the standard (non-A-trac) version of it.
@@edwardamo If you are driving at certain speed and system recognises wheelspin - it should not intervene like a-trac cause you will loose momentum. On the other hand it cannot leave the wheels entirely free cause speed difference may become too big and... You will lose the momentum to. Besides - immediate intervention of brake system would cause problems during cornering. This is actually very complicated matter, manufacturers have different ideas about, different modes, brakes tunings etc.
@@4x4.tests.on.rollers Are you saying A-trac is too aggressive to be used in normal driving conditions (e.g., icy roads) and so should only be turned on when you're either off-roading or actually stuck?
@@edwardamo I can't be sure cause I have never driven it. But on the basis of descriptions and tests and my own experiences with others systems it looks like it is designed for low speeds driving through heavy obstacles. Like rock climbing and similar so too aggressive for normal road driving.
Amazing system and innovation, But I can't help but think that all of this is solved so much more simply in EVs with quad motors. The future is going to be interesting.
Nice to see the rollers come back. Now that TFL has all this property, it would be nice to see a concrete pad built on a slight slope. That would really separate traction control systems.
Very true, nearly every 4x4 trim level does 99% just as good as a pro. The only exception is the Limited, which does a great job, but it's not as competent off road as the other trims.
@@ShenmueAtheist yeah my sister got a ‘22 limited, she wanted the luxury and capability combo. The only truck that’s better in that field is the Lexus LX IMO
@@ShenmueAtheist the limited does just fine. Just replace the bumpers, front and rear for better approach and departure angle. It is exactly the same as any other forerunner, except that it has full-time four-wheel-drive.
I own a 4Runner and i love it. this is my sequence on 4x4 when stuck, 2WD-4HI, 4lo, A-TRAC, Crawl control and if all else fails Locking the diff takes care of it. Tommy I am glad to see the knowledge, time and love you put in your videos.
Your sequence of progression makes sense. Where would you fit in Multi-Terrain Select (maybe it doesn't fit into a "stuck" scenario)? I've yet to find a good video that demos all 5 off road systems in a priority of use manner.
This is the best demonstration of A-Trac I've ever seen. I'm truly impressed. This has dramatically increased 4Runner on my potential new 4x4 list. Thanks Tommy. This was awesome!
In older vehicles with open differentials you can usually bump the brakes and get the differential to shift to the other side. That's the original traction control system.
@@astro2456 it does, but you can modulate the brakes versus just slamming them on. The throttle will power through the brakes. The braking just makes the torque transfer to the tire that has traction.
@@astro2456 I would think you would need to do some magic footwork to modulate the brakes as well as the clutch and find that third foot to mash the accelerator lol.
My SR5 with A-Trac has taken me everywhere I wanted to go. It does make a lot of noise though. My buddies have 2 door wranglers and make fun of the wagon but I still hear them say "that A-Trac kicked in and you went right through it" when spotting me. Having good AT tires vs those all seasons makes a big difference too.
I love watching the 4Runner. I wish you guys could do more but it does what it does and there ain't no more to see. As a former Toyota expert, A-Trac came about as a simple, no extra parts to wear and break, no rocket science solution to locking diffs. It still works today.
@@wildman1137 It works great for basic off roading or anything a stock 4Runner will encounter. It is not designed to be a replacement for front and rear lockers to go rock crawling. Also as you can hear it works the ABS system pretty hard and can over-heat, which is why it is not a locker replacement. Tommy even says that near the end of the video. I have it on my Sequoia and it works great going down logging roads and pipeline/powerline right-of-ways. I can cross a ditch no problem with one wheel off the ground and I don't have to carry a ton of momentum to make it. Just keep the same throttle position and let the brakes hold the spinning wheel. With my wife and four kids in the truck we can get to some pretty cool places in comfort and not trash our daily driver. For the crazy stuff I have my old trail rig with front and rear ARB lockers and mud terrain tires. It won't fit the whole family but it is a lot more fun and capable off road.
That isn't true, plenty of AWD systems that are brake-based are very capable off road and there are videos of A-trac helping 4Runners off-road. No, the system is not a replacement for lockers, but it is only extremely hardcore terrain where you need the differentials locked constantly. Lockers for the front differential are rarely engaged even in hardcore situations, and if so, only momentarily to get out of a bad situation.
@@WheelsRCool or you could just get them standard in a ZR2 and not goof around. And as a bonus, the ZR2 comes with real AT tires, not those garbage no-seasons. You Toyota fan boys are hilarious. Even the "pro" model uses this band-aid.
It's nice to see these tests on a standard 4Runner 4WD transmission. I've always wondered if I made a mistake by not getting a locking differential and Crawl Control, but it looks like A-trac will be more than adequate for our needs. Thanks!
As always, great presentation! As an old school guy, we used the “poor man’s locker” by slightly applying brakes while the wheels were spinning . The electronic stuff, red tow hooks, 360 cameras, etc. is very cool. But let’s not forget the basics. I would love to see you try this technique on the Explorer.
Ah! That's what my WK2 needs! Red Tow Hooks! I consider my WK a very light duty off roader. No colored tow hooks, no manufacturers badges. Just a well appointed luxury SUV that I put 32s on. Gets the job done. Amazing what manufacturers will do to their rigs to cash in on the off road craze of today.
@@astro2456 Mine is passing Ferraris on track... The fact that is has a better 4WD system than the Tacoma TRD Off Road towing it is lost on people because it has 3" of ground clearance =D Seriously, the legendary Mitsubishis principally accomplished these goals mechanically. Sales in the US rarely included the good bits, and the Pajero/Montero isn't even sold here anymore, so it's not going to get a mention from a journalist covering current models, most of which have this eLSD junk.
For older 4wd vehicles that don't have traction control or a locker, you can use the parking brake to simulate what A-TRAC does. By partially applying the parking brake, it can help divide torque between both rear wheels. This trick can work in any rear wheel drive vehicle.
My 4Runner may only have 33’s and 10” of clearance but because of this feature it is a lot more capable vehicle off-road than one might think. I’ve only used my rear locker on difficult trails but 90% of the time A-TRAC gets the job done. I rarely use MTS or CC except I will way crawl control can be incredibly useful when defending a steep/rough trail. But for most people a non-TRD model will get the job done
@@jameskocks4734 exactly what im doing on my '17 SR5 3row. 4.56's and arb air lockers. BC 4Hi and locked should be able to work for certain road conditions w/o waiting on software to engage, + no clunky brake noises in 4Lo. If your on 33" rubber regear is needed anyway from the 3.73's and 35s will fit w minor beating of wheelwells you might as well do lockers while your in there. All the money you save on an SR5 throw at a supercharger and lockers/regear....and look HARD at the Marlin Crawler RCLT front end kit w 1 ton axle strength and LC80 steering rack for when you are locked to be reliable.
I thought crawl control was more of a gimmick than anything else until that one time it saved my truck. Parked facing upward on an inclined and off camber driveway at an off grid cabin. There is a ditch on the low side that would swallow the truck for the winter if it did not damage it. I had to back out of there on pure ice. I could not control speed and direction at the same time. Either I could stear but not slow down or I would lock all 4 wheels and slide down ever so close to the ditch. Not enough traction to climb back up either. The crawl control blew my mind. I set in on the lowest speed, angled my wheels away from the ditch and let off the brake in reverse. It worked a miracle. It felt so weird feeling single wheels brake in rapid sequence while sliding. But it kept me slow enough and gave me enough steering authority to get out clean. Imagine those videos of people sliding down steep frozen roads with 4 wheels locked. Crawl control does miracles there.
Love the honesty. I look at my WK2, which I take on dirt tracks and railroad sidings. 99% of the time it is a comfy road going SUV that gets decent gas mileage. I look at all the Wranglers on the road with lifts and hooks and stickers and think about their not so great ride and driving comfort and suspect that most of the owners would have been better served with the GC. Or, as I put it, The JK/JL is the jeep that they think they wanted but what they really were after was a WK.
Thanks for making this video Tommy, perfect example of the benefits of A-Trac. I purchased a brand new 4Runner back in late 2004 and I lifted it 6 months after purchase and wheeled it pretty hard over the 9 years I had it and so many folks were surprised how well it did, some legit thought it had lockers but all it had was A-Trac!
@@LexusGX460-OFF-ROAD Don't wheel with folks with lockers!! Makes it easy to be opinionated! My gx has it ,my jeep is locked up front and rear. Massive difference, I can and do drive both, plus not Toyota biased. Put a selectable locker in the rear of your gx and enjoy crawling with much less wheelspin and no more clatter! You will thank me later.
@@josephcervo6026 I see they (TFL) were using the 40th edition. That's what we're looking into buying. Yes, the MPG is a huge con. But, the reliability of that 4.0 is the enticing part. I'm apprehensive about the next gen 4R and the rumors of the 4cyl w/turbo. 🤷🏽♂️
@@Kung.Pao.Kitty. I have a ‘22 TRD Sport, which is my first 4Runner and love the truck. I personally wouldn’t shy away from a 4 cylinder turbo or even a hybrid, so long as it’s coming from Toyota. Not to say they are the greatest out there, but it’s a brand I have my faith in and would trust given their history with various reliable power trains.
The newer Land Rover systems are a bit more seamless but A Trac is highly effective and underrated. I used to run a well equipped FJ Cruiser and found that ATrac worked better than just the rear locker and that most any trail of consequence ATrac would get me though just fine and without having to worry about binding in tight turn situations like you would with using a locker. It does sound pretty awful though but a good/proven bit of technology.
Very cool. Would love to see a comparison of A-Trac with Quadratrac II (Jeep Grand Cherokee). I believe the QTII is always on vs. a button to engage, though.
I wouldn't want a traction control system that you can't turn off. There are situations where you need to keep your momentum and computer braking would not be beneficial.
@@Rooster_king I have a '21 Jeep Grand Cherokee Trailhawk. The system defaults to being on. I never really think about why I wouldn't want it to be on - but you bring up an interesting use case. The vehicle does have a traction control disable button that you can use.
@@byronlarson5534 Byron, your GC has Quadra-Drive II. 2005-10, QDII was ELSD Front and Rear, 2011-present, QDII is ELSD Rear only. Quadra-Trac I is a one speed transfer case (no Low Range), QTII is a two speed transfer case, Quadra-Drive II adds a locker or two. All systems use BLD. Happy Jeeping!
@@hunterhoag7272 Quadra Drive is just Quadra Trac II with a eLSD in the back. So I think he was just saying that the traction control system is always working, not that he does not understand his systems. I have a Hemi Overland with QTII
You need to try the roller test with a 4Runner Limited that has Full-Time AWD through a Torsen Center Differential and see the system works in normal every day mode, H$F.
This is a great informative video! Can you do another one on why you might want to be careful driving 4WD on pavement? (Potential to cause issues with the drivetrain to bind?)
Love a-trac. Just went to Merus recently in a mildly modified 4R and I decided to not engage lockers at all and just use a-trac. It was amazing. Been testing out those systems for years now and love it. The terrain select on the TRD models is basically A-Trac but with a dial to turn it up or down in intensity and RPM/wheelspin allowed
What happens when the breaks overheats? I saw a test with traction control, it has time limitation because of heating up breaks and smthg more (forgot what). Thats why lockers are there.
@@LexusGX460-OFF-ROAD The ABS system that is driving the brake pressure will eventually overheat. Cruise around in crawl control long enough and it will shut off due to high temp. I have experienced this in my 2020 4Runner and the owners manual mentions it as well.
@@eschweis It is NOT a replacement for lockers. Tommy even says that near the end. But it it does a good job and will serve a stock 4Runner pretty well.
I bought the above model last week in midnight black color and I LOVE IT. I am so glad I saw your video which is so educational. Thanks a lot for this awesome demo. I am not going offroading anytime soon, but it is always good to know what to do when stuck. I really appreciate this info and THANKS A LOT 😊👍👌
I would love to see a video on how you clean Blaze’s hair out of the cars before you return them. Might seem boring but I’m sure it’d get a lot of views.
Thanks for the explanation & demonstration of the 4Runner's A-Trac system. I've always wondered what the button was for & when it should be engaged. I have a 2015 4Runner Limited model which actual has full-time AWD. I've never been off road in the 2 years I've owned the vehicle so haven't needed to engage anything other than AWD. Though I have engaged the different 4-wheel drive modes from time to time so that the actuators get some use & remain functional.
Oh come on TFL, why do you show these things? Even used 4Runner prices are insane and now it will get even worse..!! Can you please limit roller and other tests only for Subarus, Hondas, Audi, BMW, Tesla etc please, and make them look good. Last time you took that FJ on the trail. This is not going good.
Excellent video! Thank you for this one. I have a new 4Runner SR5 and haven't had the opportunity to use the A-TRAC yet. This video explains the use pefrectly, can't wait to try it out!
You guys should do the same test with Nissan. I had a 2014 Frontier SV and, though there was no dedicated button, it had an extremely aggressive system in both 2wd and 4wd.
Great explanation of ATRAC! I've been a big proponent of ATRAC here in Colorado since getting my FJ in 2011 (now 4Runner). This spec of 4Runner seems to have just the ATRAC on/off toggle, rather than Multi Terrain Select (MTS) which works the same way but allows more or less wheel spin depending on your terrain type (mud, sand, rock). A front locker would be nice, but it's also nice to tell offroading groups in Ouray "turn your ATRAC on, leave your locker off" and not have to worry that anybody is using the locker incorrectly.
Correct about ATRAC and MTS. I have a 2019 Tacoma with MTS. It's like ATRAC but the driver gets to select exactly how much wheel slip he'd (or she) like. Where exactly ATRAC falls in this continuum only Toyota can say.
I still think this is the best all around vehicle on the road today. Are they going to screw it up with a turbo? Is it still going to be made in Japan? Is gas going to stay high? There are the things I want to know if I'm going to trade my Highlander on one...
If you want a 4Runner, I'd get one of the current ones. They hold such strong resell value, you could later step up to a 6th gen if Toyota doesn't screw them up.
Do I have A-Trac on my 2005 V8 4Runner SR5? Some results say it's automatically on that vehicle. Also, can I come up from Littleton, CO and practice on your course? Will you guys coach me in 4-wheelin'?
@@WheelsRCool Roller tests show how the system reacts to different grip of wheels when you're starting or driving at low speeds. That's just a part of system ability, other is dynamic behaviour like cornering etc.
Finally. I have been waiting for the 4Runner roller test. Thank you. This shows how effective ATRAC is. A tool many people forget to use. Now, if I can only get them to do a KDSS vs non KDSS comparison video.
Honda IVTM-4 vs Toyota A-Trac. Which one is superior for providing traction when one or even 3 wheels have no or low traction? Also, does the Honda Ridgeline/Pilot/Passport also have any sort of similar brake lock traction assist?
A-Trac is a nice, inexpensive, traction control system. However, it (and others liken it) are "reactive" systems, meaning they only do their thing after wheel spin has been detected. True lockers in the rear and front differentials, as well as a transfer case that can send equal power to the rear and front axles (AKA part time, or a full time transfer case with a 4-loc position) are "proactive" systems. This means that if the driver is paying attention, they can lock up both axles and the transfer case before tackling an off road obstacle. Not only would the vehicle most likely walk right through the obstacle, it would do far less damage to the trail versus a "reactive" system that has to detect spinning tires before using traction control to send power to the wheels that actually have traction.
Bought an old Land Cruiser 100 series last year. Chose to get a 2000 over a 98 or a 99. Stronger front diff, but more importantly it has A-Trac rather than a rear locker. Like having reaction control front and rear. Just keep it under 2.5k rpm and it'll take you anywhere.
I don't want this at all. There was a vid from (I believe) one of the sister shows to tfl. In it, a 4runner was put through a course. During the course the driver was faced with a sharp turn to the left, then had to drive through a narrow path between two trees, followed by a steep hill, all in the mud. This innocuous scenario defeated the 4runners ability to continue up the hill. It was unable to progress past the tree narrowed path and regain momentum. There was no ability to spin the tires to get up the hill portion. The traction system out-thought itself and having open diffs, it was unable to move under its own unassisted steam. Whereas a vehicle with locker options would have had zero issue doing so and with a lot more control. These systems work for people with no skill and/or ability. I don't want to hear clunking and be forced to let the computers do what they will. Just make a trim package that has a locking transfer case, and front and rear lockers that when engaged render the crawl control systems moot. Give it a rubber floor mat with washable seats/interior, a 3" lift and bfg's/duratrac's/wildpeak's as standard. Give it full skid plates and a hardcore winch with mounting points fore and aft. And how about the standard tranny out of the Tacoma, to finish the package. I'd GLADLY pay 10-15k over list for that option pack over one of these gadget relying trucks. All this with a factory warranty is a no brainer. I've spent a lifetime building a skillset. To have something so easily defeated by a muddy hill and a narrow path is almost an insult. I want to get out in the woods and have fun. To press buttons and hope they get me out of a jam is tge opposite of fun. It's for folks who mallcrawl and get stuck on slippery grass or 6" of snow. Make something for folks we want to get out in the woods for a few days and the make it back, be able to wash the interior out and have it be able do the weekly routine with as an every day vehicle until the next adventure. Shut up, and take my money.
This is just really informative even for me who is looking at getting into a 4Runner. Knowing this option for A Trac works well I may not need to go up to a trim with MTS since I'm not a heavy off roader by any means, yet
I went to an off-roading event last month with my 4Runner. I have the trim with a locker, but there was somebody there with an SR5 version that was doing harder trails than I was. The ATRAC really is effective, and if you get to a point where it's not, you can add a locker to it after the fact.
Great video guys and gals! I have a triple double locked 4runner. And I find atrac is fantastic for almost everything. Sure, there's extreme situations where lockers really have the advantage. But the great thing is atrac is standard on every 4runner and they all are very capable even completely stock. Imo the biggest thing Toyota needs to change is to make it more obvious and user friendly. First - make it a toggle switch so it stays on when you turn on and off the vehicle. Second- put the switch down on the 4wd actuator so novices know where to find it. Make it idiot proof.
@@trailrunnah8886 it's when you have 5 differentials and all of them lock. You know, like a 8x8. Haha. It was a typo. I meant triple locked, but really double locked. - front and rear diff locks and in my case a transfer case on a TRD OR model what doesn't actually have a center differential. But that's usually referred to as triple locked because the transfer case is locked. A true triple locked wood usually apply to something like a Land Cruiser with a center differential that can also be locked. Mine was a TRD OR with an aftermarket front locker.
Great video. One of the best ATrac videos I have seen. I recently purchased a 23 4Runner Heritage Edition - White color and paused for a bit before buying thinking about what I wasn’t getting compared to an Off Road. Ended up buying it based on thoughts of where I will end up taking it. Your video pretty much confirmed my thinking and thoughts. 4Runner Pros and Off Roads are awesome but the SR5 with A Trac for most users is all that is needed. Thanks again. AP
As a very loyal Toyota customer i find it disappointing that Toyota added a dedicated switch for Atrac. A feature these trucks have had for many years that simply functioned well as conditions required. So adding this button as a '" new feature " is misleading and gimmicky on Toyotas part.
Very good explanation. I own the same car. 4Runners that does not have diflock and I was a bit concerned as I take it off-roading in the desert every week. The A-Track has proved every time that it is a ver,y capable alternative to diflock.
Traction control sucks and not cutting edge, what happens when you do a water crossing or you loose your brakes? Hmm lately the only reason why I get stuck is because I forgot to turn the traction control off, the rubicon’s system is in another league compared to the Toyotas cross over system, you can’t beat selectable lockers period.
I agree that the 4runner with A-Trac performs very well off-road in 4WD-Low. It only operates at ~5 mph or slower. The A-trac system has prevented me from ever getting stuck. I have driven every type of terrain (mud, sand, ruts, rocks, mountains, etc.) and never gotten stuck. Granted I am not an idiot and don't drive into unreasonable situations, like a deep clay mud pit. Lock-differentials are great and highly over-rated when you have A-Trac - a great alternative system.
With enough load and uphill obstacle it won’t work at all without sending u sideways into a tree though. For the amount of money Toyota is charging a front locker should be standard equipment. Think of all the money they save using a 5speed and early 2000 v6 😂
Agreed! At the very least, the TRD Pro should come with a front locker and better transfer case/axle gearing. It's pretty bad to pay $50k to $60k for a vehicle and that's not even an option. ATRAC is good, but a front locker and proper gearing is exponentially better. I would have to assume they'll do both of those things if they want to remain competitive with the Bronco and Wrangler.
@@stinggreyjlr9535 they gotta do the transmission at the very least, a 7-10spd would fix so many issues with it, give u more gearing, mpg, acceleration, capability etc.
@@k20z3allmotorFTW Yup, these newer transmissions with 8-10 speeds are a huge improvement. I went from an 08 Wrangler with a 4 speed auto to my 18 Wrangler with the 8 speed and it was a night and day difference. I was running 33's on my old Jeep and I'm running 35's on this one and it still has more power/better gas mileage.
A Toyota 4Runner front locker upgrade is not expensive and is available from ARB or Eaton. I agree though, it should’ve came installed from the factory. I highly recommend 4.56 Nitro gears and the Eaton front locker, it’s how Toyota should have done it.
Great informative video. One thing people should not before thinking locking diffs are unnecessary is that traction control takes time. Especially if you're on steeper hills, and in loose terrain like snow, sand, or mud, that time means you dig deeper and slow down more, making the obstacle more difficult. Especially when you have AWD and/or no low range t-case, that can really hurt your ability to power out of where you encountered the issue in the first place. Whereas a locking diff (or multiple, for front/rear) you'd turn on before entering the bad section, and could avoid being stuck in the first place. But it's definitely better than nothing.
wonder if crawl control would have preformed as well. with jeep with automatics (Selec Speed Control), ford (Trail Control), and GM (with "terrain mode" on new interior 1500's) all having competing modes i would love to see a showdown.
This. We need a video using the same test method and comparing all different awd and 4x4's traction control systems and see truly which one fails and which one triumphs.
I love the A-trac and MTS in my 4-runner. I have only really thrown my rear-locker on to make sure it gets a work out and does not freeze up from lack of use now. Granted I have not done a lot that really requires the locker, but have definitely been in a few places where I would have been cross axeled and had to dual pedal my way out (basically manually trying to do what A-trac does) and the 4Runner just paused for a fraction and then kept going. It is great. My other favorite feature is the fact that crawl control works in reverse.
@@Jtwizzle it is sort of adjustable atrac like you said but some modes like sand for example, will make the system less aggressive and allow for more slip, if it was aggressive in that scenario (loose deeper sand), you would more likely end up stuck since it would scrub off your speed quickly.
Nothing beats lockers imo as they act before you loose traction and therefor maintaining momentum. However, my hilux with a-trc (and locking rear if I want to) does get me out of 98% of all situations, especially for me as I don't want trail damage on a new vehicle (not trying the hardest trails).
One of the things that’s nice about a Land Cruiser is that A-trac is always on. No button to push to engage it. And when you’re in low range it operates even quicker.
Great test of the 4x4 system. I would like to see a comparison test of the 3 4wd options on Jeep Grand Cherokee WK2 and also the systems used on the Wrangler JL. Would be a proper used cars buyer's guide.
Congrats for recognizing that torque is being split evenly on an open diff, even if only one wheel is spinning. So many "experts" just say all the torque goes to one side.
I have to be honest I stopped watching for a while as Roman was getting a little electric biased, but I will start watching again as i miss the great reviews that you guys do. As always great job Tommy
I have a 2018 4Runner TRD Off Road model. When I'm wheeling, in low range, I normally have ATRAC on and it goes anywhere I point it, with out much drama. When things get really extreme, since it's an Off Road model, I leave ATRAC on and engage the rear locker. It's a great four wheel drive system and very capable.
Rivian is said to have the best system with fine electronic control of each wheel, truly independent. It also has a flat bottom with no differential sticking down. The problem is that Rivians are very heavy, for their size, not so great for downhill or other situations.
The lack of a gear reduction can make trailing difficult. Those powerful motors build up power and rpm too quickly in some situations. It looks like it makes crawling through tough obstacles a little more difficult
Emmm IDK. There's this kazakh guy that does 4x4 tests in the kazakh desert and Land Rover seems to have the best push a button and forget about it 4WD/AWD system. While Toyota has excellent tools but Land Rover one is so noob-friendly when you get stuck. Land Rover's long term quality is a different matter though.
Traction-control systems seem to be getting way better. They still cut power, unlike lockers/LSDs, but they sure react much quicker and more effectively than the early TC systems did.
A-TRAC does NOT cut power. Some Toyotas also have VSC (Vehicle Stability Control) which uses yaw sensors to determine if you’re getting sideways and cuts throttle. On the road it works in combo with A-TRAC but it’s typically not active when in offroad modes.
@@rafaeldiaz8129 It was a pig on fuel and I had a long commute at that time. Sold it to fellah to use as his “back woods vehicle.” Even though the KDSS system was shot, it was still a very capable machine.
A-Trac is quite incredible. I always used to think computers were a joke in vehicles. Then, I got stuck in the snow last winter in my Tacoma. Turned on A-Trac and it pulled its way out in about 10 seconds
Thank you, thank you, thank you for stating correctly at 3:15 that the torque is equal to both wheels with an OPEN differential! The rest of the video is excellent too, showing that a good traction control system is very useful. Now if only all the manufacturers would spend the time to figure out good programming for their traction control systems.
Haha, yep, it drives me crazy how many reviewers get this wrong, too. It's amazing how many say a conventional 4wd transfer case or locked center diff means you're always getting equal power (and/or torque) at both axles.
@@edwardamo Not only reviewers get this wrong, many or majority marketing folders provide the same info. The problem is that people are focused on what they see by eyes thus they mix torque with rotational speed.
@@4x4.tests.on.rollers Yeh, but we would hope the reviewers are more educated on the subject. Of course even the manufacturers get in on creating confusion, saying their AWD system can send up to 50% or 70% of the torque to the rear wheels. As tests with rollers under the front wheels show, many can send nearly 100% of the torque to the rear wheels. Maybe they mean 50% or 70% of the maximum torque, but its not at all clear what the number really represents -- if anything.
The 2003-2006 Mitsubishi Montero also has a very impressive traction control system. I'd love to see yall put it to the test on this system. Hell I'd even offer up my own Montero.
Great video explaining A-Trac Tommy. I really wish this was standard equipment or even was an option for my 2020 Tacoama TRD Sport DCLB 4x4. I'd choose this over an optional locker any day as it's way more practical for everyday driving. The standard, simulated, rear LSD on the Tacomas is nowhere near as capable as A-Trac unless you get the e-locker.
I just picked my 4runner up at the end of February. Enjoy it. Got some minor gripes, but it is great overall. I love now having all the new tech bs. I don't have to think to drive it
A-Trac is a form of brake activated limited slip. I know Toyota folks think it's something special simply because it's from Toyota but it's just a really good version of ABLS. The Toyota system has gotten markedly better over the years, especially in the newest 4Runners, Tacoma and 300 series Land Cruisers. Before it was like so many others where the system was too slow to react and not enough brake force was applied to the spinning wheel. For all their reliability issues Land Rover and Mercedes still lead the pack with their ABLS systems. They are the quickest to sense the spinning wheel, the quickest to stop it and stop it completely and the quickest to redirect power. However, even with such fast acting systems when those same vehicles are equipped with lockers and the lockers are engaged the response is even faster and the recovery more smooth.
Based on what I’ve seen, the KL Cherokee has the best traction system I’ve ever seen. On Red Cone, the FJ had atrac and the KL had whatever Jeep has. The KL had an easier time.
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Why advertise for Nissan on a Toyota video 😂
@@nowayoutstp4 yeah same thoughts here
ASR is an acronym is the US for Anti-Slip Regulation! At least for Benz it is!
The pathfinder is a “truck”
You know what’s best? Watching Tommy go from young expert to basically running the show. So so cool. Thank you for everything.
True. I was just thinking the other day of how much his camera presence has improved. Something people may not notice if they are just consuming the content.
Kudos also to his Dad for encouraging him and allowing him to slowly (as he should) take over the show!
Agree, I think Tommy is great on here and no offense to anyone else but I’m more prone to watch a video if Tommy is hosting vs the others.
Apple polisher
Agreed. Tommy has brought a great dynamic to the channel, and this has kept me watching for all these years.
ATRAC is always the answer. It IS a brake locking differential. We've tried to get ATRAC to get "stuck" on our GX460 and have yet to get it stuck... very excellent system and I will say superior to "traditional lockers"... 👏
Locker locks wheels to the same speed, TCS locks wheels to stationary position. It works good enough in many situations, but it is not better.
@@petrnemecek4379 naw, ATRAC is better. Locker will have 25% to each wheel. ATRAC will send nearly 50% to 1 wheel if the other looses traction. On a locker if 1 wheel goes in the air the max the other wheel will get is 25% power..
The best thing that made this 4runner the best was the friend at the backseat just chilling and wondering why dad keeps driving like a madman.
Great video. It’s really impressive how quickly that A-Trac works.
ATRAC works great, although a bit noisy. The 4Runner's have had ATRAC since the 3rd gen's 2001 model year.
So why isn't the normal traction control system as aggressive as A-trac? In other words, why do you have to turn A-trac on instead of that just being how it always works?
There are many situations when you have to let the tyres spin.
@@4x4.tests.on.rollers Fair point, but in those situations I assume you'd want to turn off traction control entirely. What I can't figure out is why you'd ever want traction control on, but only the standard (non-A-trac) version of it.
@@edwardamo If you are driving at certain speed and system recognises wheelspin - it should not intervene like a-trac cause you will loose momentum. On the other hand it cannot leave the wheels entirely free cause speed difference may become too big and... You will lose the momentum to. Besides - immediate intervention of brake system would cause problems during cornering. This is actually very complicated matter, manufacturers have different ideas about, different modes, brakes tunings etc.
@@4x4.tests.on.rollers Are you saying A-trac is too aggressive to be used in normal driving conditions (e.g., icy roads) and so should only be turned on when you're either off-roading or actually stuck?
@@edwardamo I can't be sure cause I have never driven it. But on the basis of descriptions and tests and my own experiences with others systems it looks like it is designed for low speeds driving through heavy obstacles. Like rock climbing and similar so too aggressive for normal road driving.
Amazing system and innovation, But I can't help but think that all of this is solved so much more simply in EVs with quad motors. The future is going to be interesting.
Yeah thats good, but Land rovers traction control is even better!
Nice to see the rollers come back. Now that TFL has all this property, it would be nice to see a concrete pad built on a slight slope. That would really separate traction control systems.
This ^
Probably the most comprehensive review of ATrac that I’ve seen so far.
it's a phenomenal system... we're unable to get ATRAC "stuck" offroading
My 4Runner takes me everywhere I need for my Nature & Wildlife photography. Best vehicle I have ever purchased!
But not the best SUV may come below top 5 best SUV's in the world
@@mohammeds5458okay, the most durable SUV the 4runner is and thats been proven.
Been saying for years, any SR5 with A Trac is 90% of a TRD Pro. People think they need a TRD Pro to go off-road, but that’s just silly.
Very true, nearly every 4x4 trim level does 99% just as good as a pro. The only exception is the Limited, which does a great job, but it's not as competent off road as the other trims.
@@ShenmueAtheist yeah my sister got a ‘22 limited, she wanted the luxury and capability combo. The only truck that’s better in that field is the Lexus LX IMO
It’s a great guy and even better with a Bernese in the back
Maybe 75%
@@ShenmueAtheist the limited does just fine. Just replace the bumpers, front and rear for better approach and departure angle. It is exactly the same as any other forerunner, except that it has full-time four-wheel-drive.
I own a 4Runner and i love it. this is my sequence on 4x4 when stuck, 2WD-4HI, 4lo, A-TRAC, Crawl control and if all else fails Locking the diff takes care of it.
Tommy I am glad to see the knowledge, time and love you put in your videos.
Your sequence of progression makes sense. Where would you fit in Multi-Terrain Select (maybe it doesn't fit into a "stuck" scenario)? I've yet to find a good video that demos all 5 off road systems in a priority of use manner.
This is the best demonstration of A-Trac I've ever seen. I'm truly impressed. This has dramatically increased 4Runner on my potential new 4x4 list. Thanks Tommy. This was awesome!
What other 4x4 vehicles are you looking at?
@@80for80mainly Bronco and 200 series Land Cruiser. Others that were lower on the list were 4runner, grand Cherokee trail hawk, and Yukon AT4.
@@theinternets7516 get a 4Runner. You won’t regret it.
In older vehicles with open differentials you can usually bump the brakes and get the differential to shift to the other side. That's the original traction control system.
cool, but won't it break both the tires at the back? what's the principle over there?
@@astro2456 it does, but you can modulate the brakes versus just slamming them on. The throttle will power through the brakes. The braking just makes the torque transfer to the tire that has traction.
@@bayou_angler87 Will this technique also works on manual ? I own a manual, I was planning to install some fiddle breaks to mimic the traction.
@@astro2456 I would think you would need to do some magic footwork to modulate the brakes as well as the clutch and find that third foot to mash the accelerator lol.
@@bayou_angler87 oh I wish I had functional third leg 😂 will put a accelerator lever behind the steering.
My SR5 with A-Trac has taken me everywhere I wanted to go. It does make a lot of noise though. My buddies have 2 door wranglers and make fun of the wagon but I still hear them say "that A-Trac kicked in and you went right through it" when spotting me. Having good AT tires vs those all seasons makes a big difference too.
I love watching the 4Runner. I wish you guys could do more but it does what it does and there ain't no more to see. As a former Toyota expert, A-Trac came about as a simple, no extra parts to wear and break, no rocket science solution to locking diffs. It still works today.
LOL it's basic 1990's traction control. It's useless off-road or on an incline, brake-based TC is worthless.
@@wildman1137 It works great for basic off roading or anything a stock 4Runner will encounter. It is not designed to be a replacement for front and rear lockers to go rock crawling. Also as you can hear it works the ABS system pretty hard and can over-heat, which is why it is not a locker replacement. Tommy even says that near the end of the video.
I have it on my Sequoia and it works great going down logging roads and pipeline/powerline right-of-ways. I can cross a ditch no problem with one wheel off the ground and I don't have to carry a ton of momentum to make it. Just keep the same throttle position and let the brakes hold the spinning wheel. With my wife and four kids in the truck we can get to some pretty cool places in comfort and not trash our daily driver. For the crazy stuff I have my old trail rig with front and rear ARB lockers and mud terrain tires. It won't fit the whole family but it is a lot more fun and capable off road.
That isn't true, plenty of AWD systems that are brake-based are very capable off road and there are videos of A-trac helping 4Runners off-road. No, the system is not a replacement for lockers, but it is only extremely hardcore terrain where you need the differentials locked constantly. Lockers for the front differential are rarely engaged even in hardcore situations, and if so, only momentarily to get out of a bad situation.
4Runners also can be equipped with lockers aftermarket. The 4Runner off-road variants come with a rear locker equipped.
@@WheelsRCool or you could just get them standard in a ZR2 and not goof around. And as a bonus, the ZR2 comes with real AT tires, not those garbage no-seasons. You Toyota fan boys are hilarious. Even the "pro" model uses this band-aid.
It's nice to see these tests on a standard 4Runner 4WD transmission. I've always wondered if I made a mistake by not getting a locking differential and Crawl Control, but it looks like A-trac will be more than adequate for our needs. Thanks!
As always, great presentation! As an old school guy, we used the “poor man’s locker” by slightly applying brakes while the wheels were spinning . The electronic stuff, red tow hooks, 360 cameras, etc. is very cool. But let’s not forget the basics. I would love to see you try this technique on the Explorer.
Where is mistubushi
Ah! That's what my WK2 needs! Red Tow Hooks!
I consider my WK a very light duty off roader. No colored tow hooks, no manufacturers badges. Just a well appointed luxury SUV that I put 32s on. Gets the job done. Amazing what manufacturers will do to their rigs to cash in on the off road craze of today.
@@astro2456 Mine is passing Ferraris on track... The fact that is has a better 4WD system than the Tacoma TRD Off Road towing it is lost on people because it has 3" of ground clearance =D
Seriously, the legendary Mitsubishis principally accomplished these goals mechanically. Sales in the US rarely included the good bits, and the Pajero/Montero isn't even sold here anymore, so it's not going to get a mention from a journalist covering current models, most of which have this eLSD junk.
Used to do this in my RWD 1999 Explorer. Never got stuck even with just RWD. Just use a little handbrake to get unstuck. :)
@@angelgjr1999 what is the principle that's happening there?, won't both tires get locked up over there?
For older 4wd vehicles that don't have traction control or a locker, you can use the parking brake
to simulate what A-TRAC does. By partially applying the parking brake, it can help divide torque
between both rear wheels. This trick can work in any rear wheel drive vehicle.
Same can be done in 4WD or FWD and just modulate the brakes while under acceleration and this can often get you unstuck.
Most newer vehicles have automatic parking brake- no manual option
My 4Runner may only have 33’s and 10” of clearance but because of this feature it is a lot more capable vehicle off-road than one might think. I’ve only used my rear locker on difficult trails but 90% of the time A-TRAC gets the job done. I rarely use MTS or CC except I will way crawl control can be incredibly useful when defending a steep/rough trail. But for most people a non-TRD model will get the job done
in other words SR5 4 wheell drive for a discount with the option to do lockers later on.
@@jameskocks4734 exactly what im doing on my '17 SR5 3row. 4.56's and arb air lockers. BC 4Hi and locked should be able to work for certain road conditions w/o waiting on software to engage, + no clunky brake noises in 4Lo. If your on 33" rubber regear is needed anyway from the 3.73's and 35s will fit w minor beating of wheelwells you might as well do lockers while your in there. All the money you save on an SR5 throw at a supercharger and lockers/regear....and look HARD at the Marlin Crawler RCLT front end kit w 1 ton axle strength and LC80 steering rack for when you are locked to be reliable.
I thought crawl control was more of a gimmick than anything else until that one time it saved my truck. Parked facing upward on an inclined and off camber driveway at an off grid cabin. There is a ditch on the low side that would swallow the truck for the winter if it did not damage it. I had to back out of there on pure ice. I could not control speed and direction at the same time. Either I could stear but not slow down or I would lock all 4 wheels and slide down ever so close to the ditch. Not enough traction to climb back up either.
The crawl control blew my mind. I set in on the lowest speed, angled my wheels away from the ditch and let off the brake in reverse. It worked a miracle. It felt so weird feeling single wheels brake in rapid sequence while sliding. But it kept me slow enough and gave me enough steering authority to get out clean. Imagine those videos of people sliding down steep frozen roads with 4 wheels locked. Crawl control does miracles there.
I'll never get tired of watching these demonstrations even though my 4Runner almost never leaves pavement.
Love the honesty. I look at my WK2, which I take on dirt tracks and railroad sidings. 99% of the time it is a comfy road going SUV that gets decent gas mileage. I look at all the Wranglers on the road with lifts and hooks and stickers and think about their not so great ride and driving comfort and suspect that most of the owners would have been better served with the GC. Or, as I put it, The JK/JL is the jeep that they think they wanted but what they really were after was a WK.
Also - funny that Nissan sponsored a video about how great Toyota is.
Thanks for making this video Tommy, perfect example of the benefits of A-Trac. I purchased a brand new 4Runner back in late 2004 and I lifted it 6 months after purchase and wheeled it pretty hard over the 9 years I had it and so many folks were surprised how well it did, some legit thought it had lockers but all it had was A-Trac!
ATRAC is better than lockers... truth
@GX460 OFF-ROAD naw you loose momentum with a-trac. I'm still a fan though.
@@Turshin nope, not true.. watch our video at Cleghorn Ridge.. 45 degrees uphill with ATRAC on 3,2, and 1 wheel.. no momentum or traction lost...
@@LexusGX460-OFF-ROAD too bad none of the AWD suvs from Toyota/Lexus offer anything close to this...CH-R, RAV4, Highlander, NX, RX...
@@LexusGX460-OFF-ROAD Don't wheel with folks with lockers!!
Makes it easy to be opinionated!
My gx has it ,my jeep is locked up front and rear. Massive difference, I can and do drive both, plus not Toyota biased. Put a selectable locker in the rear of your gx and enjoy crawling with much less wheelspin and no more clatter!
You will thank me later.
just got me a 2013 4runner with a-track and i'm excited to use it :)
Great explanation! As a long time 4Runner owner, I never understood the difference with A-Trac. Incredibly helpful video!
Tommy, THIS was a great video. Very applicable for hundreds of thousands of 4R owners
We're on the market for a 4x4. The 4Runner is on top of the list.
The only downside is MPG, everything else is great
@@josephcervo6026 I see they (TFL) were using the 40th edition. That's what we're looking into buying. Yes, the MPG is a huge con. But, the reliability of that 4.0 is the enticing part. I'm apprehensive about the next gen 4R and the rumors of the 4cyl w/turbo. 🤷🏽♂️
@@Kung.Pao.Kitty. I have a ‘22 TRD Sport, which is my first 4Runner and love the truck. I personally wouldn’t shy away from a 4 cylinder turbo or even a hybrid, so long as it’s coming from Toyota. Not to say they are the greatest out there, but it’s a brand I have my faith in and would trust given their history with various reliable power trains.
I’m sorry
The newer Land Rover systems are a bit more seamless but A Trac is highly effective and underrated. I used to run a well equipped FJ Cruiser and found that ATrac worked better than just the rear locker and that most any trail of consequence ATrac would get me though just fine and without having to worry about binding in tight turn situations like you would with using a locker. It does sound pretty awful though but a good/proven bit of technology.
Very cool. Would love to see a comparison of A-Trac with Quadratrac II (Jeep Grand Cherokee). I believe the QTII is always on vs. a button to engage, though.
I wouldn't want a traction control system that you can't turn off. There are situations where you need to keep your momentum and computer braking would not be beneficial.
@@Rooster_king I have a '21 Jeep Grand Cherokee Trailhawk. The system defaults to being on. I never really think about why I wouldn't want it to be on - but you bring up an interesting use case. The vehicle does have a traction control disable button that you can use.
@@byronlarson5534 Byron, your GC has Quadra-Drive II. 2005-10, QDII was ELSD Front and Rear, 2011-present, QDII is ELSD Rear only.
Quadra-Trac I is a one speed transfer case (no Low Range), QTII is a two speed transfer case, Quadra-Drive II adds a locker or two. All systems use BLD. Happy Jeeping!
SAND
@@hunterhoag7272 Quadra Drive is just Quadra Trac II with a eLSD in the back. So I think he was just saying that the traction control system is always working, not that he does not understand his systems. I have a Hemi Overland with QTII
You need to try the roller test with a 4Runner Limited that has Full-Time AWD through a Torsen Center Differential and see the system works in normal every day mode, H$F.
This system on my 07 limited sequoia takes me places I shouldn’t go. It’s actually too capable sometimes. Pretty amazing.
Same with my Tacoma. I have taken some light body damage because it can go where it shouldn't!
like Oakland International streets picking up hookers, definitely places a family hauler should not go
The Sequoia is so underrated. Just picked up an 05 to do a build on.
This is a great informative video! Can you do another one on why you might want to be careful driving 4WD on pavement? (Potential to cause issues with the drivetrain to bind?)
Would love to see more off road videos with this trim level of 4Runner
Love a-trac. Just went to Merus recently in a mildly modified 4R and I decided to not engage lockers at all and just use a-trac. It was amazing. Been testing out those systems for years now and love it. The terrain select on the TRD models is basically A-Trac but with a dial to turn it up or down in intensity and RPM/wheelspin allowed
Love ATRAC ❤️ has never let us down yet!
What happens when the breaks overheats? I saw a test with traction control, it has time limitation because of heating up breaks and smthg more (forgot what). Thats why lockers are there.
@@DMEU77 I've never seen atrac overheat... the break pulses are rapid and temporary to send power to the other wheel...
@@LexusGX460-OFF-ROAD The ABS system that is driving the brake pressure will eventually overheat. Cruise around in crawl control long enough and it will shut off due to high temp. I have experienced this in my 2020 4Runner and the owners manual mentions it as well.
@@eschweis It is NOT a replacement for lockers. Tommy even says that near the end. But it it does a good job and will serve a stock 4Runner pretty well.
Tommy, please lubricate those new traction rollers before you burn up the bear..... never mind :P
I had an 8-track in my 1977 Grand Prix SJ. Oh, wait, different thing. ///yeah, I'm old! ;-)
I bought the above model last week in midnight black color and I LOVE IT. I am so glad I saw your video which is so educational. Thanks a lot for this awesome demo. I am not going offroading anytime soon, but it is always good to know what to do when stuck. I really appreciate this info and THANKS A LOT 😊👍👌
I just bought the white limited version today. Great rig.
@@VOX471 TRD pro midnight black...so sweet
I would love to see a video on how you clean Blaze’s hair out of the cars before you return them. Might seem boring but I’m sure it’d get a lot of views.
Thanks for the explanation & demonstration of the 4Runner's A-Trac system. I've always wondered what the button was for & when it should be engaged. I have a 2015 4Runner Limited model which actual has full-time AWD. I've never been off road in the 2 years I've owned the vehicle so haven't needed to engage anything other than AWD. Though I have engaged the different 4-wheel drive modes from time to time so that the actuators get some use & remain functional.
Oh come on TFL, why do you show these things? Even used 4Runner prices are insane and now it will get even worse..!! Can you please limit roller and other tests only for Subarus, Hondas, Audi, BMW, Tesla etc please, and make them look good. Last time you took that FJ on the trail. This is not going good.
Excellent video! Thank you for this one. I have a new 4Runner SR5 and haven't had the opportunity to use the A-TRAC yet. This video explains the use pefrectly, can't wait to try it out!
You guys should do the same test with Nissan. I had a 2014 Frontier SV and, though there was no dedicated button, it had an extremely aggressive system in both 2wd and 4wd.
Great explanation of ATRAC! I've been a big proponent of ATRAC here in Colorado since getting my FJ in 2011 (now 4Runner).
This spec of 4Runner seems to have just the ATRAC on/off toggle, rather than Multi Terrain Select (MTS) which works the same way but allows more or less wheel spin depending on your terrain type (mud, sand, rock). A front locker would be nice, but it's also nice to tell offroading groups in Ouray "turn your ATRAC on, leave your locker off" and not have to worry that anybody is using the locker incorrectly.
You can also add aftermarket lockers to 4Runners.
Correct about ATRAC and MTS. I have a 2019 Tacoma with MTS. It's like ATRAC but the driver gets to select exactly how much wheel slip he'd (or she) like. Where exactly ATRAC falls in this continuum only Toyota can say.
I still think this is the best all around vehicle on the road today. Are they going to screw it up with a turbo? Is it still going to be made in Japan? Is gas going to stay high? There are the things I want to know if I'm going to trade my Highlander on one...
If you want a 4Runner, I'd get one of the current ones. They hold such strong resell value, you could later step up to a 6th gen if Toyota doesn't screw them up.
This is a good point.
I hope they add a turbo to it. I have one, the worst thing about it is the engine and transmission.
Do I have A-Trac on my 2005 V8 4Runner SR5? Some results say it's automatically on that vehicle. Also, can I come up from Littleton, CO and practice on your course? Will you guys coach me in 4-wheelin'?
I really like these roller tests on the many different vehicles. Knowledge of them help people make the correct choice when buying an AWD or 4X4.
These tests are great but they cannot be an oracle over the AWD/4WD/4x4 system.
What do you mean?
@@WheelsRCool Roller tests show how the system reacts to different grip of wheels when you're starting or driving at low speeds. That's just a part of system ability, other is dynamic behaviour like cornering etc.
These brake-centered traction control systems are a great way to warp your rotors driving in mud, ice, or snow.
Finally. I have been waiting for the 4Runner roller test. Thank you. This shows how effective ATRAC is. A tool many people forget to use.
Now, if I can only get them to do a KDSS vs non KDSS comparison video.
KDSS is unreal. I love it so much.
Are you kidding ? Vrs Toyota Land Cruiser FJ 79 , V8 TDI , MB AMG G63 , Granadier , Ford Bronco Wildtrack ?
Maybe , only in your town
Brie Larson? Hard pass.
Honda IVTM-4 vs Toyota A-Trac. Which one is superior for providing traction when one or even 3 wheels have no or low traction? Also, does the Honda Ridgeline/Pilot/Passport also have any sort of similar brake lock traction assist?
My grandmother bought a 4Runner when she was 18 years old and its still running!
A-Trac is a nice, inexpensive, traction control system. However, it (and others liken it) are "reactive" systems, meaning they only do their thing after wheel spin has been detected. True lockers in the rear and front differentials, as well as a transfer case that can send equal power to the rear and front axles (AKA part time, or a full time transfer case with a 4-loc position) are "proactive" systems. This means that if the driver is paying attention, they can lock up both axles and the transfer case before tackling an off road obstacle. Not only would the vehicle most likely walk right through the obstacle, it would do far less damage to the trail versus a "reactive" system that has to detect spinning tires before using traction control to send power to the wheels that actually have traction.
Bought an old Land Cruiser 100 series last year. Chose to get a 2000 over a 98 or a 99. Stronger front diff, but more importantly it has A-Trac rather than a rear locker. Like having reaction control front and rear. Just keep it under 2.5k rpm and it'll take you anywhere.
I don't want this at all. There was a vid from (I believe) one of the sister shows to tfl. In it, a 4runner was put through a course. During the course the driver was faced with a sharp turn to the left, then had to drive through a narrow path between two trees, followed by a steep hill, all in the mud. This innocuous scenario defeated the 4runners ability to continue up the hill. It was unable to progress past the tree narrowed path and regain momentum. There was no ability to spin the tires to get up the hill portion. The traction system out-thought itself and having open diffs, it was unable to move under its own unassisted steam. Whereas a vehicle with locker options would have had zero issue doing so and with a lot more control. These systems work for people with no skill and/or ability. I don't want to hear clunking and be forced to let the computers do what they will. Just make a trim package that has a locking transfer case, and front and rear lockers that when engaged render the crawl control systems moot. Give it a rubber floor mat with washable seats/interior, a 3" lift and bfg's/duratrac's/wildpeak's as standard. Give it full skid plates and a hardcore winch with mounting points fore and aft. And how about the standard tranny out of the Tacoma, to finish the package. I'd GLADLY pay 10-15k over list for that option pack over one of these gadget relying trucks. All this with a factory warranty is a no brainer. I've spent a lifetime building a skillset. To have something so easily defeated by a muddy hill and a narrow path is almost an insult. I want to get out in the woods and have fun. To press buttons and hope they get me out of a jam is tge opposite of fun. It's for folks who mallcrawl and get stuck on slippery grass or 6" of snow. Make something for folks we want to get out in the woods for a few days and the make it back, be able to wash the interior out and have it be able do the weekly routine with as an every day vehicle until the next adventure.
Shut up, and take my money.
I think Jeep builds the vehicle you're looking for, the Wrangler Rubicon.
Tommy we need more roller test please?!
This is just really informative even for me who is looking at getting into a 4Runner. Knowing this option for A Trac works well I may not need to go up to a trim with MTS since I'm not a heavy off roader by any means, yet
I went to an off-roading event last month with my 4Runner. I have the trim with a locker, but there was somebody there with an SR5 version that was doing harder trails than I was. The ATRAC really is effective, and if you get to a point where it's not, you can add a locker to it after the fact.
ATRAC is very effective. Only place a locker would be better is in rock crawling.
Great video guys and gals! I have a triple double locked 4runner. And I find atrac is fantastic for almost everything. Sure, there's extreme situations where lockers really have the advantage. But the great thing is atrac is standard on every 4runner and they all are very capable even completely stock.
Imo the biggest thing Toyota needs to change is to make it more obvious and user friendly. First - make it a toggle switch so it stays on when you turn on and off the vehicle. Second- put the switch down on the 4wd actuator so novices know where to find it. Make it idiot proof.
@@MrJcjet what is "triple double locked'"?
@@trailrunnah8886 it's when you have 5 differentials and all of them lock. You know, like a 8x8. Haha.
It was a typo. I meant triple locked, but really double locked. - front and rear diff locks and in my case a transfer case on a TRD OR model what doesn't actually have a center differential. But that's usually referred to as triple locked because the transfer case is locked. A true triple locked wood usually apply to something like a Land Cruiser with a center differential that can also be locked. Mine was a TRD OR with an aftermarket front locker.
Great video. One of the best ATrac videos I have seen. I recently purchased a 23 4Runner Heritage Edition - White color and paused for a bit before buying thinking about what I wasn’t getting compared to an Off Road. Ended up buying it based on thoughts of where I will end up taking it. Your video pretty much confirmed my thinking and thoughts. 4Runner Pros and Off Roads are awesome but the SR5 with A Trac for most users is all that is needed. Thanks again. AP
all you need is ATRAC
As a very loyal Toyota customer i find it disappointing that Toyota added a dedicated switch for Atrac. A feature these trucks have had for many years that simply functioned well as conditions required.
So adding this button as a '" new feature " is misleading and gimmicky on Toyotas part.
Very good explanation. I own the same car. 4Runners that does not have diflock and I was a bit concerned as I take it off-roading in the desert every week. The A-Track has proved every time that it is a ver,y capable alternative to diflock.
Land Rover and Toyota have the best traction systems easily
Traction control sucks and not cutting edge, what happens when you do a water crossing or you loose your brakes? Hmm lately the only reason why I get stuck is because I forgot to turn the traction control off, the rubicon’s system is in another league compared to the Toyotas cross over system, you can’t beat selectable lockers period.
I agree that the 4runner with A-Trac performs very well off-road in 4WD-Low. It only operates at ~5 mph or slower. The A-trac system has prevented me from ever getting stuck. I have driven every type of terrain (mud, sand, ruts, rocks, mountains, etc.) and never gotten stuck. Granted I am not an idiot and don't drive into unreasonable situations, like a deep clay mud pit. Lock-differentials are great and highly over-rated when you have A-Trac - a great alternative system.
With enough load and uphill obstacle it won’t work at all without sending u sideways into a tree though. For the amount of money Toyota is charging a front locker should be standard equipment. Think of all the money they save using a 5speed and early 2000 v6 😂
Agreed! At the very least, the TRD Pro should come with a front locker and better transfer case/axle gearing. It's pretty bad to pay $50k to $60k for a vehicle and that's not even an option. ATRAC is good, but a front locker and proper gearing is exponentially better.
I would have to assume they'll do both of those things if they want to remain competitive with the Bronco and Wrangler.
@@stinggreyjlr9535 they gotta do the transmission at the very least, a 7-10spd would fix so many issues with it, give u more gearing, mpg, acceleration, capability etc.
@@k20z3allmotorFTW Yup, these newer transmissions with 8-10 speeds are a huge improvement. I went from an 08 Wrangler with a 4 speed auto to my 18 Wrangler with the 8 speed and it was a night and day difference. I was running 33's on my old Jeep and I'm running 35's on this one and it still has more power/better gas mileage.
A Toyota 4Runner front locker upgrade is not expensive and is available from ARB or Eaton. I agree though, it should’ve came installed from the factory.
I highly recommend 4.56 Nitro gears and the Eaton front locker, it’s how Toyota should have done it.
@@jaysonc2102 lol those mods on a already 50-60k rig is ridiculous and still will have a boring 5spd
Great informative video. One thing people should not before thinking locking diffs are unnecessary is that traction control takes time. Especially if you're on steeper hills, and in loose terrain like snow, sand, or mud, that time means you dig deeper and slow down more, making the obstacle more difficult. Especially when you have AWD and/or no low range t-case, that can really hurt your ability to power out of where you encountered the issue in the first place. Whereas a locking diff (or multiple, for front/rear) you'd turn on before entering the bad section, and could avoid being stuck in the first place.
But it's definitely better than nothing.
Actually in ice, a locking differential can cause you to slide. This system maybe slightly better
ADD ❤TORSEN FRONT AND REAR LSD problem solved no thinking 🤔 need
wonder if crawl control would have preformed as well. with jeep with automatics (Selec Speed Control), ford (Trail Control), and GM (with "terrain mode" on new interior 1500's) all having competing modes i would love to see a showdown.
This. We need a video using the same test method and comparing all different awd and 4x4's traction control systems and see truly which one fails and which one triumphs.
Do not regret getting an SR5. You can buy the TRD skid and shocks for under 1k.
I love the A-trac and MTS in my 4-runner. I have only really thrown my rear-locker on to make sure it gets a work out and does not freeze up from lack of use now. Granted I have not done a lot that really requires the locker, but have definitely been in a few places where I would have been cross axeled and had to dual pedal my way out (basically manually trying to do what A-trac does) and the 4Runner just paused for a fraction and then kept going. It is great. My other favorite feature is the fact that crawl control works in reverse.
Why does it have both atrac and mts though? MTS is just an adjustable atrac.
@@Jtwizzle
Great question. I have no idea but would like an experienced person to tell us.
@skippylippy547 Yeah, after a year of waiting, I was hoping someone had some info.
@@Jtwizzle
I'll call the Toyota dealer and see if I can get an answer.
@@Jtwizzle it is sort of adjustable atrac like you said but some modes like sand for example, will make the system less aggressive and allow for more slip, if it was aggressive in that scenario (loose deeper sand), you would more likely end up stuck since it would scrub off your speed quickly.
Nobody talks about? Jeez that’s all the Toyota guys talk about. It is great system though.
Thanks for explaining this! I’ve been wanting to learn more about 4wd systems because I want a 4Runner :)
What about ATRAC vs the system in the LR3 you guys had? Land Rover’s system seems virtually instant
Nothing beats lockers imo as they act before you loose traction and therefor maintaining momentum.
However, my hilux with a-trc (and locking rear if I want to) does get me out of 98% of all situations, especially for me as I don't want trail damage on a new vehicle (not trying the hardest trails).
whered you get it
Just a thought can u use regular traction control and work the brakes manually have u tried that ?
One of the things that’s nice about a Land Cruiser is that A-trac is always on. No button to push to engage it. And when you’re in low range it operates even quicker.
So is the Nissan Frontier.
So is a Jeep 4x4 with Brake Lock Differential (BLD)
Yeah I was a little confused when I checked out a friends 4Runner and saw the atrac button. Atrac is always on in my gx470. And it works so good.
@@chipper203 interesting. I have a 2017 Prado, which is essentially a GX460, and I have the A trac button. My vehicle is an always on 4WD.
@@jayd3931 my 470 is a 2004, and I have no atrak button. 🤷🏼♀️
Toyota builds most practical off-roaders..
Great test of the 4x4 system. I would like to see a comparison test of the 3 4wd options on Jeep Grand Cherokee WK2 and also the systems used on the Wrangler JL. Would be a proper used cars buyer's guide.
Congrats for recognizing that torque is being split evenly on an open diff, even if only one wheel is spinning. So many "experts" just say all the torque goes to one side.
The secret button😵
I have to be honest I stopped watching for a while as Roman was getting a little electric biased, but I will start watching again as i miss the great reviews that you guys do. As always great job Tommy
I have a 2018 4Runner TRD Off Road model. When I'm wheeling, in low range, I normally have ATRAC on and it goes anywhere I point it, with out much drama. When things get really extreme, since it's an Off Road model, I leave ATRAC on and engage the rear locker. It's a great four wheel drive system and very capable.
My 2020 TRD OR has gotten stuck on flat, wet grass... none of the fancy buttons or dials, in any combination got it out
@@adamsanderson5217 Were you in 2 wheel drive, 4 wheel high range, or 4 wheel low range when this happened?
Tire quality and there pressure make a huge difference.
@@cj8489 100% correct. I'm running KO2s and they are very good on the terrain where I live. I also have a system for airing down and up.
So is the A-Track button only working on 4-Low??
I have a TrdPro with the rear locker, and with the rear locked and A-Trac on it's an absolute beast. Have never been stuck once.
same here... love ATRAC
A word from your sponsors Nissan. Host proceeds to introduce Toyota 😕
Rivian is said to have the best system with fine electronic control of each wheel, truly independent. It also has a flat bottom with no differential sticking down. The problem is that Rivians are very heavy, for their size, not so great for downhill or other situations.
The lack of a gear reduction can make trailing difficult. Those powerful motors build up power and rpm too quickly in some situations. It looks like it makes crawling through tough obstacles a little more difficult
Emmm IDK. There's this kazakh guy that does 4x4 tests in the kazakh desert and Land Rover seems to have the best push a button and forget about it 4WD/AWD system. While Toyota has excellent tools but Land Rover one is so noob-friendly when you get stuck. Land Rover's long term quality is a different matter though.
Quality and price😄
Traction-control systems seem to be getting way better. They still cut power, unlike lockers/LSDs, but they sure react much quicker and more effectively than the early TC systems did.
A-TRAC does NOT cut power. Some Toyotas also have VSC (Vehicle Stability Control) which uses yaw sensors to determine if you’re getting sideways and cuts throttle. On the road it works in combo with A-TRAC but it’s typically not active when in offroad modes.
@@Hammbone2519 A-TRAC doesn't apply brake to a slipping corner?
@RKmndo atrac does apply brakes but does not cut power. Many vehicles with stability control will cut power but it can simply be turned off on some.
I love the fact that my 4Runner has both A-Trac and a locking rear diff. Not many places I can't go. If I get it stuck I've accomplished something.
I had a 2011 TRD Off Road and played around with all the settings going up an icy hill. Very impressive system and your video illustrated it well. 👍
What u do with it bud
@@rafaeldiaz8129 It was a pig on fuel and I had a long commute at that time. Sold it to fellah to use as his “back woods vehicle.” Even though the KDSS system was shot, it was still a very capable machine.
A-Trac is quite incredible. I always used to think computers were a joke in vehicles. Then, I got stuck in the snow last winter in my Tacoma. Turned on A-Trac and it pulled its way out in about 10 seconds
Thank you, thank you, thank you for stating correctly at 3:15 that the torque is equal to both wheels with an OPEN differential! The rest of the video is excellent too, showing that a good traction control system is very useful. Now if only all the manufacturers would spend the time to figure out good programming for their traction control systems.
Haha, yep, it drives me crazy how many reviewers get this wrong, too. It's amazing how many say a conventional 4wd transfer case or locked center diff means you're always getting equal power (and/or torque) at both axles.
@@edwardamo Not only reviewers get this wrong, many or majority marketing folders provide the same info. The problem is that people are focused on what they see by eyes thus they mix torque with rotational speed.
@@4x4.tests.on.rollers Yeh, but we would hope the reviewers are more educated on the subject. Of course even the manufacturers get in on creating confusion, saying their AWD system can send up to 50% or 70% of the torque to the rear wheels. As tests with rollers under the front wheels show, many can send nearly 100% of the torque to the rear wheels. Maybe they mean 50% or 70% of the maximum torque, but its not at all clear what the number really represents -- if anything.
Nissan actually had thid first and it's called ABLS which is auto activated vs having a fancy button called atrac.
The 2003-2006 Mitsubishi Montero also has a very impressive traction control system. I'd love to see yall put it to the test on this system. Hell I'd even offer up my own Montero.
Yeah it has a clutch and liquid (something like that 😅) , and it’ll stop working once it gets hot. Toyota is all electronic. Both cool.
Land Rover terrain response: “Am I dead to you?”
Great video explaining A-Trac Tommy. I really wish this was standard equipment or even was an option for my 2020 Tacoama TRD Sport DCLB 4x4. I'd choose this over an optional locker any day as it's way more practical for everyday driving. The standard, simulated, rear LSD on the Tacomas is nowhere near as capable as A-Trac unless you get the e-locker.
Don’t you have crawl control? That’s basically ATRAC at a new level of awesome!
@@rambokd No, TRD Sports do not come with crawl control, MTS or an e-locker.
Ah maybe it starts at the TRD off-road trim level. My Brother in-law has it and I thought it was a Taco thing across 4x4 trims.
@@rambokd Yes, only the TRD Off-Roads and Pro’s with Automatic Transmissions. Manual Transmissions get A-Trac.
In my '21 Pro, I have never needed the locking diff, between MTS/Crawl/Atrac it's always had me covered so far.
One mode does lock the rear diff, it just doesn’t give you the light feedback.
I just picked my 4runner up at the end of February. Enjoy it. Got some minor gripes, but it is great overall. I love now having all the new tech bs. I don't have to think to drive it
A-Trac is a form of brake activated limited slip. I know Toyota folks think it's something special simply because it's from Toyota but it's just a really good version of ABLS. The Toyota system has gotten markedly better over the years, especially in the newest 4Runners, Tacoma and 300 series Land Cruisers. Before it was like so many others where the system was too slow to react and not enough brake force was applied to the spinning wheel. For all their reliability issues Land Rover and Mercedes still lead the pack with their ABLS systems. They are the quickest to sense the spinning wheel, the quickest to stop it and stop it completely and the quickest to redirect power. However, even with such fast acting systems when those same vehicles are equipped with lockers and the lockers are engaged the response is even faster and the recovery more smooth.
Based on what I’ve seen, the KL Cherokee has the best traction system I’ve ever seen. On Red Cone, the FJ had atrac and the KL had whatever Jeep has. The KL had an easier time.