I was waiting for this to be explained in the video. Unfortunately it wasn't. Just one step on the gas pedal and the AWD car WILL move forward. Just afraid to do it coz it will fall from the floor jack 🤣Traction control works wonders. Those brakes are basically like clutches, you have 4 of them individually controlled by computer, turning open diffs into limited slip in an instant.
@@carlosumobile7439 Limited slip differentials use clutches to stop or slow down one side of the axle with least traction. Clutches are also BRAKES! The new traction control systems are just utilzing what is already in the car (brakes and wheel speed sensor) and engaging the brakes electronically, acting like a limited slip differential without the added hardware
*the gold-standard is the Toyota/Lexus Full-time 4WD system. Lockable center **_TORSEN_** LSD... no clutch packs in the torsen type C center diff...all mechanical... 60/40 split... lock it for 50/50... toyota owns torsen... this system is on the Landcruiser, GX460, LX600, 4runner limited and some Sequoias* ... *in your subaru wheel in the air test it spun because its a clutch based system... the Toyota system will lock up onse it senses the torque*
Torsens don’t have an infinite torque bias (usually 2.5-4 depending on the model) so they are also stuck when a tire has no traction unless some braking is done. I have a Landcruiser with a center viscous, and both that and the torsen are proven full time 4WD systems, but I think the full time system in F150s offers superior traction and handling. They use an electro-magnetic multi-plate wet clutch pack and proactively distribute power based on a number of factors (throttle/ brake input, pitch, roll, yeah, etc). An improvement over older systems like what Toyota uses where you have to break traction first before they react. And you can still lock into 4WD to distribute up to 100% of torque to one axle.
The Sequoia's also have 2WD mode. I frequently use 4WD LOW un-locked to back my trailer up steep hills. It's one of the best transfer cases I have ever had. On a side note, my Isuzu has synchronized high-low shift in the transfer case so I can use low range with the hubs open like a crawler gear, shift into high then make the 1-2 shift.
@tyeetamer torsen in this context is in the CENTER. So it's balancing axles (front/rear) not individual tires. Slip is necessary on a LSD otherwise it would be locked. So allowing some slip is the whole idea
That was confusing and incomplete. You used your friend's Audi to demonstrate open diffs in AWD but you have a Subaru sitting next to your truck and show a Honda Ridgeline at the start and those AWD systems behaves very differently.
My 17 explorer is 4WD auto. Works wonderful in snow, mud, sand, up hill gravel and all. Actually saw how it works when I was on ice today. Super interesting and cool. Saw all 4 wheels spin at the same time..then the front only then the back only then all 4 again. So interesting to watch it work
Its interesting how not all tests were performed/shown on camera so that side by side comparisons could be observed between the different vehicles. With all modern Subarus, like the one shown in this video, they are equipped with many ways to dynamically control the drivetrains at all 4 wheels independently. The Vehicle Dynamics Control and ABS modules both work to stop single tire wheel spin like what was shown with the Audi. They also work to apply more torque to tires that do have traction rather than blindly applying all power to a spinning wheel. Now I am not saying the Subaru AWD system is superior to a true 4wd drivetrain off road, it is not. However, I am pointing out that the Subaru AWD system (especially in modern vehicles) is not simply useless when one tire loses traction.
100% correct. the modern Subaru uses all kinds of cool electronic aids to help control the flow of power to different wheels. There are many different AWD set up and systems and the Subaru is a very advanced system but I was just trying to get to the basics and the differences between the two systems.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Bro the awd system you explained does not exist anymore. That Subaru have a x mode system that can send power to the wheel that have traction. The with the ridgeline.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
He completely skipped putting the subie up on a jack. It’s his bias showing. I’ve seen wrx’s walk through sections lifted trucks couldn’t. Same in the snow.
I'm surprised he is so dismissive of the the Honda/Acura AWD system. It's incredible in real world conditions like driving up a winding mountain road where the road might be clear, then slushy around the bend, then patches of snow mixed with clear/icy road. The torque vectoring system is amazing in those mixed conditions - it actually helps you corner and recover traction.
Thank you so much for making this video! I’ve spent so much time trying to understand the difference between AWD and 4x4. I’ve watched lots of videos, used tools like ChatGPT, and read many articles and websites, but none of them gave me a clear answer. Everything I found was incomplete and didn't fully answer my curiosity. This video finally explained it in a way that’s easy to understand. I really appreciate the effort you put into it. It’s the first time I’ve gotten a clear answer. Thank you! 😆
Thank you so much for this video - it was very helpful and entertaining! I live in Germany and I'm quite new to the truck & 4x4 topic...😅I bought a new RAM 1500 Classic with the 5,7 HEMI 2,5 years ago and made a dream for me come true🤗. I guess that my truck has also the classic 4 WD system - no auto 4 WD. I do now understand much better the differences. I do enjoy your videos (also the mechanic reviews and the towing) a lot! Great job! 👏👍
Great video and explanation of the various traction systems and how they work! I have an old '96 Nissan Patrol which is a true old-school, solid axle front and rear, 4x4 with a transfer case, and it's never ever let me down. My Patrol is not my daily driver, but when I do use it offroad, it never fails to put a huge smile on my face! Warm greetings from South Africa!
I have an Outback and a Ram Ecodiesel. Both are great in the snow, but the Ram is better and gets better mpg! Got over 32 mpg driving in a blizzard in 4x4 Auto mode. Don't use 4x4 Lock or Low range much, but when you need it, it's awesome.
The Subaru's always seem to be great in the snow. they have some really cool electronic wheel controls that helps with slippage. And honestly the difference between 4wd lock and 4wd auto is almost nothing.
@@GettysGaragewhat do you mean? Isn’t 4wd auto basically rwd untill rear slips and it then engages front? While 4wd lock is a 4wd all the time (and only be used on slippery roads)? Or did I get something wrong?
Hi, many great details in a short package. Excellent job. I own a Ram 1500 with « Auto mode » and we spend 99% of the time on it during winter time. It is also great when we pull our boat (6000 pounds with trailer) up the hill (gravel) and reach the road (asphalt) and perform a 90 degrees turn without stopping (while blocking the road) to unlock the differential required on 4x4 (not really safe) One of my relative changed his F150 for a newer model just to get the Auto mode after he drove my Ram during a winter trip between asphalt and icy roads. Keep up the good work!
He sums up what I've told people in a simple yet educated and professional manner. I like to think I do a decent job of explaining but I am not a certified mechanic. Thanks Heavy Mechanic . 👍
Great video, as always. I owned a 2008 Subaru WRX STI, and that did have the ability to lock the center diff, an LSD rear, and a Torsen front. That being said, ground clearance isn't going to allow the kind of off-road driving a truck or SUV would. An AWD for a different purpose, for sure. A video on 4wd auto would be awesome.
Yes I read that the higher end STI's had the ability to fully lock up the center diff which is really cool. makes a lot of sense if you are in some deep snow
@@GettysGarage It has absolutely gotten me out of some serious snow. Went sideways into a 2 foot drift in a blizzard with the wife. The wife looked at me and asked "Now what?" Now I lock the diff, back up, and we drive home. And we did.
Try that one wheel off the ground with the Honda/Acura I-VTM4 or SHAWD. It'll move the car without any problem. To make it fair.. you can lift the front wheel off the ground since it is FWD bias.
After watching a few of these videos on 4WD vs. AWD, I’ve deduced that there are a plethora of AWD systems and each, individually compare differently to standard 4WD. My Porsche Turbo has AWD (a superb track vehicle), but is a totally different system than my Range Rover AWD (an excellent off-road vehicle). Can you explain the differences? All computer controlled. How about a video on the different systems, the mechanics, and how they are set up. I would venture to guess that a AWD Range Rover programmed for off road would perform better than your RAM.
I cant comment on the Porsche Turbo, cause that could mean any number of vehicle but modern Range Rovers use what is called Permanent 4WD. Which means that by default its AWD. And assuming you have on of the more modern Range Rovers with Terrain Response it's full-time AWD with an Active Locking Center that will automatically lock it into 4WD. It uses clutch packs apple variable amounts of locking force to the center diff. And also to the rear diff if you get the optional rear diff lock
When driving the Ram in the gravel it appeared to me that he had at least the rear differential locked, which isn’t how you would normally use it… My 21 F-150 has a locking rear differential along with 4wd, and just locking my rear differential while in 2wd the inside rear tire will do exactly what his Ram did in 4wd…
The Subaru's system would have dragged the jack as well. In fact, you could have had any of the 3 wheels off the ground and it still would have moved forward. Shocking that you had the opportunity to demonstrate that, yet you didn't.
Because the Subaru would have easily came off the jack, LOL. There is a big RAM - ahem, correction - reason why he didn't do a fair test with the Subaru or a modern Audi Quattro. Anyone with a functioning braincell can see the bias.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
2 minutes in, and you're already wrong, lol. The subaru doesn't actually have a center differential. It uses a clutch pack/PTU system. The only difference between it and the "fake" awd system in that honda is that the subaru has it programmed to be always on under throttle. Otherwise its FWD
How it front wheel drive if it is AWD during throttle? FWD, RWD, and AWD are all references to how many wheels receive power from the gas pedal. How can the Subaru ever be front wheel drive if its always receiving power to all 4 wheels when pressing the accelerator?
Very well explained and educational! I just got myself a Crosstrek Wilderness and man oh man is this thing capable! Like a mountain goat lol. Sure it's not like my old Tacoma that I had with the transfer case and all but still I'm very impressed with its offroad and deep snow performance.
Well what I didn't mentioned because I didn't want to confuse everyone is that the Subaru AWD system is heavily electronically controls and will brake certain wheels to force power to other wheels. So they are very capable little beasts. but I figured I would try and stick to basics.
I'm new to AWD in my Mazda coming from a pickup trucks for years but man this thing is fun on the road. I take corners pretty fast in the rain with total confidence. My luck may run out one of these days when the tires get worn down but I love how sticky it is compared to my trucks that will just peel and burn rubber trying to get up steeply sloped wet pavement. I'd say AWD if you stay on pavement or gravel but 4wd if you really need to go driving around in the mud or rock crawling. Which is something I stopped doing with the price of the vehicles topped the $60k USD point. That activity has been discontinued.
Unfortunately, it's not so easy. And when you pointed to the Outback and said it has center differential, I chuckled. Outbacks have no center diff for over a decade now, only a clutch :))
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Unless your front differential on a conventional 4x4 pick up, jeep, ect, has lockers on the front, it's a 3wd.. I have seen 4x4 trucks that have open differentials on the front and rear.. At a very minimum, you need a LTD slip rear differential on a 4x4 truck, or jeep.
Most modern awd systems would move easily in a situation like this, that said the current Subaru awd system is very good. Not sure of the year of that Audi but I can't see any newer ones not moving in that scenario
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Is 4WD really better than AWD for a soccer mom to be driving 60mph down a wet or snowy mountain pass? You would think for a street car driving on slippery curvy roads, AWD sounds like it would be much better rather than locking up all 4 wheels and spin out unpredictably
Yeah, I think the AWD system (if not completely disengaged somehow) would've driven the other wheels without problem. I'm a bit amazed that the Audi didn't have any capacity to do the same? I've seen tests where a Subaru (and some other brand I can't remember) moved when only one wheel had traction.
Hello! You got it a little bit wrong, newer Subaru's like this don't have a center diff, they have a multi plate center clutch like all awd vehicles, they call it Active Torque Split with a 60/40 default torque split.
Great video, thanks! This video confirms that I really fucked up buying an overpriced 4x4 2011 Ford Ranger XLT a couple months ago. Not because it was overpriced, but because I'll relatively rarely get to actually enjoy the benefits of the 4x4. Don't get me wrong, I do really like the truck, but as someone who doesn't off-road and who only gets a few months of snowy weather each year, I really should have purchased something else with either an AWD system or a 4WD Auto system. Oh, and I almost forgot to mention that mine has the open diff, not even the limited slip. Ugh. It's a bummer, but oh well. The 4x4 has come in handy a couple times this winter. It's just annoying to finally realize that something like a Subaru/Honda/Mazda AWD SUV-type vehicle would be far more practical for my lifestyle. At least these Rangers hold their value :) I'll give it at least a couple years of owning it before making a change.
Thanks for this video. I have one little problem: why didn't you try that back-wheel-in-the-air trick with the Wilderness? My guess is that you know that the Wilderness would have detected the issue and put brakes on that spinning wheel, making the car move forward. Something the old Audi wasn't able to do. Also, a 4WD system is indeed better offroad than most AWD, but only if they can lock their front and/or back diffs. Without such diffs, other things being equal (tires, ground clearance, etc...) I'd take a modern AWD over that 4WD without front/back lockers.
Algorithm recommended your channel and happy to subscribe, this was a wonderful video and it was great seeing the 4WD Ram locking up it's wheels. Didn't know Auto 4WD also depended on clutch packs. I know modern Subarus w the CVT transmission also use a (wet) clutch pack in order to achieve the desired power split; never mind the amounts of software and trickery employed on modern systems to try to simulate locking diffs. It's been interesting to see the evolution of said software packages and the limitations placed on it in some iterations, like 2015 outbacks that although having X-mode(more agressive AWD settings for off road use), seem to be limited by transmission temp as opposed to actual power from the engine. You could probably make a more detailed video just on variations of AWD systems and I'm sure the comments would be fair and entirely reasonable lol.
Subaru owner for decades, like you said, on the highway or rural roads the Subie keeps traction at speed when you hit an icy spot, or big rain puddle, even wet roads it feels stuck to the pavement. I've driven Subarus in the desert on sandy roads, and snow in the mountains. Happy trails!
What about a full time 4wd system like my jeep trailhawk has. My jeep will act like a truck in 4wd when i turn especially at low speeds. When turning my tires skip and i get the 4wd bind
Show the Subaru with a tire in the air. The new Subarus have individual wheel braking to shuffle power to wheels with traction so one wheel off the ground is no problem just watch videos they are impressive. Subarus awd should be in its own category.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Really missed the boat here. The Honda torque vectoring AWD system is anything but a replica system, it’s a different approach that has a lot of efficiency advantages and still performs quite well. Videos here on RUclips of a Ridgeline going up an icy road with little issue while a 2500 Ram 4wd is just spinning all 4 of its tires.
I had a very rare 1990 Mazda MPV, wish I still had it. It was a 5 speed standard, the floor shift had a shift on the fly AWD button in the center of the shift knob. It also had a column shift lever, this was used for selecting hi or low range, and there was a center diff lock switch on this lever. So it had it all, RWD, AWD, 4WD, 2 speed transfer case! Just needed lockers LOL
Before watching the whole video let tell you what I've owned subarus, trucks with 4x4, sedan with fwd, and classic benz with rwd. In the winter full of snow, I can pass slow vehicles every time on the highway with my subaru (legacy and outback) with (cheap tires) without fearing about getting out of control. That's my experience.
Awesome explanation, thank you! I currently have a 2016 ram 1500 and GX460 but my dream is to have that power wagon you have. Lastly, I’m loving the under coating you have. I did same and took 5-6 hours spraying the underbody as well as inside of the frame with PB blasters surface shield.
Thats the good thing about Pajeros / Monteros it has an advance 4x4 super select transmission way ahead of it's time, even to some modern vehicles now. It has full time 4wd (4wd auto) and central locked 4wd (4wd) 4h and 4L. Some latest 4x4 now their 4h are not true 4x4 but actually 4wd auto. so they can only get the true 4x4 on 4L.
What about the Auto-4WD.. Many people call them AWD. My Jeep is Auto-4WD.. and called the AWD. The AWD Hyundai Tusan.. or what ever its called.. has a locking diff..
Where the audi and subaru benefit is in weight. They really have an awd system that is superior to most. Problem is subaru ruined their potential once going cvt. Torque delivery is no where near as good at slow speed crawling. But the weight difference is why they will out climb trucks any day of the week.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Nice update. Part time 4wd trucks are problematic for people looking for something that does well in mixed weather conditions, like Subaru and auto 4wd cars/trucks. Toyota tundra only offers part time 4wd. I think this is true with Sequoia as well. Titan also. Subaru offers locking center differential.
Exactly, a traditional 4wd system is not great for transitioning conditions while driving on the road. 4wd auto or awd systems are just better for on-road use in most cases. And yes I heard the STI's could come with a full locking center diff
Gen II Sequoia's have 2WD, 4HI, 4LO both unlocked or locked with a center Torsen diff. So you can drive around town essentially in AWD mode. You can also do it in 4LO, which is great for manuvering trailers on grass and not tearing up the ground. It is the best DO-ALL transfer case I have ever used.
5:42 not exactly, the front and rear axels spin at the same speed when in 4wd. That’s the problem because when turning sharply the rear wheels take a shorter track through the turn. Best example to see this is when a semi truck makes a turn and the rear wheels of the trailer cut the turn short. Since the rear wheels spin at the same rate as the front wheels in 4wd, they have to slip since they’re traveling less distance. Otherwise the rear axel will break since it spins at the same speed as the front axel.
Why didn't you do a fair test with an modern Audi Quattro or do the same jack test with the Subaru? Why did you omit the (arguably extremely pertinent) fact that wheel slipping will be limited electronically with VCD? Why did you omit the fact that a modern Audi or Subaru can overcome loss of traction on not 1, not 2, but up to even 3 wheels? ruclips.net/video/elFM6qg9rM8/видео.htmlsi=tLQo3WmBsb9IphYM Viewers should hope that it was a simple oversight on your part, not bias stemming from the ownership of a certain vehicle with a certain drivetrain.
Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
For use in mud or snow: A 4WD system with the transfer case locked in and a limited slip rear differential gives you 3WD. One of the front tires can slip. An AWD system allocates power to 4 tires, so, isn't that better? If an AWD applies brakes to any slipping tire and if 3 tires are slipping, does that mean you have 1WD? (A 4WD with limited slip differential in front is pretty rare.)
You forgot to mention that modern AWD systems use computerized wheel braking to redirect power to the wheels with traction. Granted, it is not as effective as a true locker, but it does give some additional traction to AWD systems.
The funny thing is so do the AWD cars in the video. Audi has been using an electronic locking system that uses ABS to lock spinning wheels. This guy must have disabled it just to get views.
I believe this part of the video 1:38 is misleading. Honda’s IVTM4 system on Ridgeline and Pilots actually constantly send power to the rear wheels, that’s why their fuel economy aren’t as good as those part time systems found in mainstream subcompact SUVs. Part of the reasons to blame are actually on car companies, 4WD don’t necessarily equates to 4WD, but can sometimes be exactly the same as AWD. Just marketing. Watch Auto Buyers Guide’s channel for more details on this confusing subject
If you want to put that Subaru in X mode and then jacked up the rear end it would have went forward too. Audi Quattro systems aren't what they used to be. They are good but not like they were.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Ok now i am confused, so what does my 02 Sequoia have? I can have 2wd, 4hi on the go without locking the center diff(AWD) and 4lo with and with out locking the transfer case. I always tought it was a similiar system as the land cruiser.
I don’t know. My 2022 Subaru Forester has xmode which breaks tye spinning wheel and forces power to other 3. Works like a charm. I don’t know what this guy is up too. Probably 10 years old tech or something
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Mitsubishi Magna AWD 50/50 split rear limited slip differential with viscous centre coupling When on the highway it’s more 70 rear 30 front Same AWD system as Evo6/galant Vr4 All mechanical works great has been on beach and thick mud never gotten stuck yet Loves wet grassy hills
I like the borgwarner in our h3 adventure.. planetary type diff for 60/40 split rather than clutches for "awd" then fully locking 4hi and 4low when needed along with rear locker.
Had an older "AWD"" SUV that was really 4WD auto. The clutch pack burnt out at 105,000 miles. What about these Toyota hybrids that have a separate, independent motor on the back axle? Seems as though there is no connection between the front and back axles.
Very nice and clear, yeah I'd like to see a video only for auto AWD system, many brands use for example the haldex which is not that bad in some context.
If you get a chance, please make a video of AWD in electric vehicles and how that works, its advantages, disadvantages, such as reliability, effectiveness, etc.
My Guy thank you very much for this video one of the bests videos I've seen. I drove my 4x4 on a hard gravel road and felt the high tention torque on system en wheel spinning and though something was wrong and diff locking without turning, this explains thank you
@@GettysGarage Try it with slicks in the snow... Tire grib is king. No grib, no go GI... Take it from one who drove in the snow and snot slick hills of Korea while in the Army. Even 10 wd Duce and a Halves don't go up hill with slick tires.
A failure on xdrive awd is the dependance on wheel speed detection. If an axle breaks, it free spins and and good 3 wheels get no power. A 4x4 would usually offer a diff lock to keep you crawling.
Our RDX delivers power front and rear, that test wouldn’t work. It also wouldn’t work on the Subaru because of brake vectoring. It would apply brake to the elevated wheel or wheels and put power to the wheels on the ground. Bronco Sport Badlands and Maverick Tremor have a rear clutch that locks the rear putting power to both rear wheels along with brake vectoring.
4WD Auto has improved to the point where most manufacturers completely couple the clutch pack together when set to 4WD Lock, which eliminates slippage and thus any heating or wear for off-road use. Other then cost and complication\more points of failure, the main disadvantage is either size and weight when made tough enough to match the strength of part-time 4WD, or strength and durability when made to fit inside an area designed for a part-time 4WD transfer case. I would not leave it in full time\auto 4WD while off-road in low to no traction conditions; that mode is really meant for mixed conditions of both high and low traction, like paved roads in poor weather conditions where the clutch pack will be engaging less often and under lower loads.
An accurate but grossly oversimplified explanation. I couldn't help but notice you left out the electronics completely. Modern all-wheel drive cars have sophisticated sensors that would sense the spinning wheel, lock it, and send power to the other wheels with traction to get the car unstuck. Using computers and sensors, they can do 8-9/10th of what a dedicated 4x4 can do.
That was strange how he left that information out. Audi has had that system in place since 1996 so they must have disabled it for the test in this video.
Power wagon has a different suspension, comes with a winch and differential lockers, also an electronic from sway bar disconnect for better front axle pivot range for better off road traction/flex
So did you drive your old Ram in 4wd auto all the time or did you drive it in 2wd and only engage the 4wd auto when it may be slippery conditions in some places?
I think you should clarify the the segment about wheel hop on the Power Wagon. You can drive the Power Wagon on dry pavement in 4WD with no problem because both differentials are open when not locked.But you can’t drive it on dry pavement if the axles are locked. The owners manual states 4WD High can be driven on pavement up to 55 mph. I apologize if I misunderstood what you were saying. That aside, this is a very informative video. Thanks for the great content, as usual.
As far as I know, RAM only uses part-time 4WD transfer cases from New Venture or Borg Warner in their HD trucks. They do not have a center coupling or differential, so they should NOT be driven on dry pavement for long periods of time. Any turning will result in binding because the front wheels take a shorter path around a turn than the rear. It has nothing to do with the differentials in the axles.
Appreciate the comment! So I guess maybe where the misunderstanding is that none of my diffs were locked. Both front and rear were left wide open. The front and rear drive shafts spin at different speeds going into the fully locked transfer case when turning. This results in one wheel being forced to skip. Fun story, my girlfriend used to drive my PW to work (shorter distance) and I left the truck in 4wd for a thumbnail picture. She called me and said the truck will not move when she turned and she was panicking because she thought she broke something. she took the truck out of 4wd and everything was fine. This was because on dry pavement to driveline was completely binding up. It's a tough concept the wrap your head around but an AWD system uses 3 differentials and that 3rd diff or center diff takes of that difference in speed of the front and rear driveshaft. where my truck has only two differentials and a locked transfer case instead of a 3rd differential therefore causing binding.
Hello Mr Getty? I guess that's your name...just came to mention also that driving in 4WD generally on tarmac and any hard surface EVEN IN A STRAIGHT LINE will put stress on your driveline. Not just turns and corners. There's always slight differences in wheel speeds between left and right, front and rear axles too. When in 4x4 on hard surfaces this shortens component life
Systems in most modern AWD use the brakes to lock the spinning wheel which transfers power to the wheels with traction.
Yeah, I think this dude is a bit biased towards the full 4WD. The AWD he described that can't have one wheel without traction is not a modern one IMO.
I was waiting for this to be explained in the video. Unfortunately it wasn't. Just one step on the gas pedal and the AWD car WILL move forward. Just afraid to do it coz it will fall from the floor jack 🤣Traction control works wonders. Those brakes are basically like clutches, you have 4 of them individually controlled by computer, turning open diffs into limited slip in an instant.
Exactly. He said they tested the Outback Wilderness. They didn't show that. The OBW redistributes power and would have pulled away.
Wr0ng that AWD will selectively use the brake to lock the spinning wheel and move.
@@carlosumobile7439 Limited slip differentials use clutches to stop or slow down one side of the axle with least traction. Clutches are also BRAKES! The new traction control systems are just utilzing what is already in the car (brakes and wheel speed sensor) and engaging the brakes electronically, acting like a limited slip differential without the added hardware
*the gold-standard is the Toyota/Lexus Full-time 4WD system. Lockable center **_TORSEN_** LSD... no clutch packs in the torsen type C center diff...all mechanical... 60/40 split... lock it for 50/50... toyota owns torsen... this system is on the Landcruiser, GX460, LX600, 4runner limited and some Sequoias* ... *in your subaru wheel in the air test it spun because its a clutch based system... the Toyota system will lock up onse it senses the torque*
Torsens don’t have an infinite torque bias (usually 2.5-4 depending on the model) so they are also stuck when a tire has no traction unless some braking is done.
I have a Landcruiser with a center viscous, and both that and the torsen are proven full time 4WD systems, but I think the full time system in F150s offers superior traction and handling. They use an electro-magnetic multi-plate wet clutch pack and proactively distribute power based on a number of factors (throttle/ brake input, pitch, roll, yeah, etc). An improvement over older systems like what Toyota uses where you have to break traction first before they react. And you can still lock into 4WD to distribute up to 100% of torque to one axle.
The Sequoia's also have 2WD mode. I frequently use 4WD LOW un-locked to back my trailer up steep hills. It's one of the best transfer cases I have ever had.
On a side note, my Isuzu has synchronized high-low shift in the transfer case so I can use low range with the hubs open like a crawler gear, shift into high then make the 1-2 shift.
@tyeetamer torsen in this context is in the CENTER. So it's balancing axles (front/rear) not individual tires. Slip is necessary on a LSD otherwise it would be locked. So allowing some slip is the whole idea
@@LexusGX460-OFF-ROADYes, my comment was regarding center differentials and other ways of achieving AWD . . .
How many WRC or Dakar Rally events has Toyota won?
I feel like the only thing missing is a discussion about the applications and advantages of lockers in 4wd systems.
thats just what i was about to say, those rams have front and rear diff lock
Power Wagons are awesome. If not for the mpg, woulda bought one.
I own a Subaru and a Ram. This really helped me further understand the difference between the AWD and 4x4 system. Subbed. Thank you!
I own a footsubishi and I will also keep that in mind
What you prefer ?
I think subaru system is little diferent to other. I wish to see this video. Why we can see audi. I dont understand
That was confusing and incomplete. You used your friend's Audi to demonstrate open diffs in AWD but you have a Subaru sitting next to your truck and show a Honda Ridgeline at the start and those AWD systems behaves very differently.
My 17 explorer is 4WD auto. Works wonderful in snow, mud, sand, up hill gravel and all. Actually saw how it works when I was on ice today. Super interesting and cool. Saw all 4 wheels spin at the same time..then the front only then the back only then all 4 again. So interesting to watch it work
This is weird. You actually taught me quite a bit. I know little about AWD systems. You did great teaching. Really appreciate it bud.
lol happy you got something out of it!
Its interesting how not all tests were performed/shown on camera so that side by side comparisons could be observed between the different vehicles. With all modern Subarus, like the one shown in this video, they are equipped with many ways to dynamically control the drivetrains at all 4 wheels independently. The Vehicle Dynamics Control and ABS modules both work to stop single tire wheel spin like what was shown with the Audi. They also work to apply more torque to tires that do have traction rather than blindly applying all power to a spinning wheel. Now I am not saying the Subaru AWD system is superior to a true 4wd drivetrain off road, it is not. However, I am pointing out that the Subaru AWD system (especially in modern vehicles) is not simply useless when one tire loses traction.
100% correct. the modern Subaru uses all kinds of cool electronic aids to help control the flow of power to different wheels. There are many different AWD set up and systems and the Subaru is a very advanced system but I was just trying to get to the basics and the differences between the two systems.
💯%
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Bro the awd system you explained does not exist anymore. That Subaru have a x mode system that can send power to the wheel that have traction. The with the ridgeline.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
He completely skipped putting the subie up on a jack. It’s his bias showing. I’ve seen wrx’s walk through sections lifted trucks couldn’t. Same in the snow.
Perfectly explained! Thanks. I am a Ford guy but will say that your Ram 2500 is a beautiful truck!
No, it’s not a diesel And it has tiny tires
I'm surprised he is so dismissive of the the Honda/Acura AWD system. It's incredible in real world conditions like driving up a winding mountain road where the road might be clear, then slushy around the bend, then patches of snow mixed with clear/icy road. The torque vectoring system is amazing in those mixed conditions - it actually helps you corner and recover traction.
Thank you so much for making this video! I’ve spent so much time trying to understand the difference between AWD and 4x4. I’ve watched lots of videos, used tools like ChatGPT, and read many articles and websites, but none of them gave me a clear answer. Everything I found was incomplete and didn't fully answer my curiosity. This video finally explained it in a way that’s easy to understand. I really appreciate the effort you put into it. It’s the first time I’ve gotten a clear answer. Thank you! 😆
Thank you so much for this video - it was very helpful and entertaining!
I live in Germany and I'm quite new to the truck & 4x4 topic...😅I bought a new RAM 1500 Classic with the 5,7 HEMI 2,5 years ago and made a dream for me come true🤗. I guess that my truck has also the classic 4 WD system - no auto 4 WD. I do now understand much better the differences.
I do enjoy your videos (also the mechanic reviews and the towing) a lot! Great job! 👏👍
Great video and explanation of the various traction systems and how they work! I have an old '96 Nissan Patrol which is a true old-school, solid axle front and rear, 4x4 with a transfer case, and it's never ever let me down. My Patrol is not my daily driver, but when I do use it offroad, it never fails to put a huge smile on my face! Warm greetings from South Africa!
My favorite part of the video is now I have a new way to say Audi (aw-di) instead of (ow-di).
I have an Outback and a Ram Ecodiesel. Both are great in the snow, but the Ram is better and gets better mpg! Got over 32 mpg driving in a blizzard in 4x4 Auto mode. Don't use 4x4 Lock or Low range much, but when you need it, it's awesome.
The Subaru's always seem to be great in the snow. they have some really cool electronic wheel controls that helps with slippage. And honestly the difference between 4wd lock and 4wd auto is almost nothing.
@@GettysGaragewhat do you mean? Isn’t 4wd auto basically rwd untill rear slips and it then engages front? While 4wd lock is a 4wd all the time (and only be used on slippery roads)? Or did I get something wrong?
Hi, many great details in a short package. Excellent job. I own a Ram 1500 with « Auto mode » and we spend 99% of the time on it during winter time. It is also great when we pull our boat (6000 pounds with trailer) up the hill (gravel) and reach the road (asphalt) and perform a 90 degrees turn without stopping (while blocking the road) to unlock the differential required on 4x4 (not really safe) One of my relative changed his F150 for a newer model just to get the Auto mode after he drove my Ram during a winter trip between asphalt and icy roads. Keep up the good work!
He sums up what I've told people in a simple yet educated and professional manner.
I like to think I do a decent job of explaining but I am not a certified mechanic.
Thanks Heavy Mechanic . 👍
Thank you sir!
Great video, as always. I owned a 2008 Subaru WRX STI, and that did have the ability to lock the center diff, an LSD rear, and a Torsen front. That being said, ground clearance isn't going to allow the kind of off-road driving a truck or SUV would. An AWD for a different purpose, for sure. A video on 4wd auto would be awesome.
Yes I read that the higher end STI's had the ability to fully lock up the center diff which is really cool. makes a lot of sense if you are in some deep snow
@@GettysGarage
It has absolutely gotten me out of some serious snow. Went sideways into a 2 foot drift in a blizzard with the wife. The wife looked at me and asked "Now what?" Now I lock the diff, back up, and we drive home. And we did.
Try that one wheel off the ground with the Honda/Acura I-VTM4 or SHAWD. It'll move the car without any problem. To make it fair.. you can lift the front wheel off the ground since it is FWD bias.
My Suzuki SX4 has three modes: 2wd, 4wd-auto, and 4wd-lock (locking differential). I lock the diff if heavy snow and have never been stuck. Great car!
Those cars have a really cool manually activated locking system. Not great cars in all other ways but I like that they can do that.
After watching a few of these videos on 4WD vs. AWD, I’ve deduced that there are a plethora of AWD systems and each, individually compare differently to standard 4WD. My Porsche Turbo has AWD (a superb track vehicle), but is a totally different system than my Range Rover AWD (an excellent off-road vehicle). Can you explain the differences? All computer controlled. How about a video on the different systems, the mechanics, and how they are set up. I would venture to guess that a AWD Range Rover programmed for off road would perform better than your RAM.
I cant comment on the Porsche Turbo, cause that could mean any number of vehicle but modern Range Rovers use what is called Permanent 4WD. Which means that by default its AWD. And assuming you have on of the more modern Range Rovers with Terrain Response it's full-time AWD with an Active Locking Center that will automatically lock it into 4WD. It uses clutch packs apple variable amounts of locking force to the center diff. And also to the rear diff if you get the optional rear diff lock
When driving the Ram in the gravel it appeared to me that he had at least the rear differential locked, which isn’t how you would normally use it… My 21 F-150 has a locking rear differential along with 4wd, and just locking my rear differential while in 2wd the inside rear tire will do exactly what his Ram did in 4wd…
The Subaru's system would have dragged the jack as well. In fact, you could have had any of the 3 wheels off the ground and it still would have moved forward. Shocking that you had the opportunity to demonstrate that, yet you didn't.
Because the Subaru would have easily came off the jack, LOL. There is a big RAM - ahem, correction - reason why he didn't do a fair test with the Subaru or a modern Audi Quattro.
Anyone with a functioning braincell can see the bias.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
2 minutes in, and you're already wrong, lol. The subaru doesn't actually have a center differential. It uses a clutch pack/PTU system. The only difference between it and the "fake" awd system in that honda is that the subaru has it programmed to be always on under throttle. Otherwise its FWD
How it front wheel drive if it is AWD during throttle? FWD, RWD, and AWD are all references to how many wheels receive power from the gas pedal. How can the Subaru ever be front wheel drive if its always receiving power to all 4 wheels when pressing the accelerator?
@KG-kq9tk Its not, its FWD off throttle.
Very well explained and educational! I just got myself a Crosstrek Wilderness and man oh man is this thing capable! Like a mountain goat lol. Sure it's not like my old Tacoma that I had with the transfer case and all but still I'm very impressed with its offroad and deep snow performance.
Well what I didn't mentioned because I didn't want to confuse everyone is that the Subaru AWD system is heavily electronically controls and will brake certain wheels to force power to other wheels. So they are very capable little beasts. but I figured I would try and stick to basics.
@@GettysGarage this is still the basics with AWD. Your demonstration of AWD in this video is highly misleading
I'm new to AWD in my Mazda coming from a pickup trucks for years but man this thing is fun on the road. I take corners pretty fast in the rain with total confidence. My luck may run out one of these days when the tires get worn down but I love how sticky it is compared to my trucks that will just peel and burn rubber trying to get up steeply sloped wet pavement. I'd say AWD if you stay on pavement or gravel but 4wd if you really need to go driving around in the mud or rock crawling. Which is something I stopped doing with the price of the vehicles topped the $60k USD point. That activity has been discontinued.
Unfortunately, it's not so easy. And when you pointed to the Outback and said it has center differential, I chuckled. Outbacks have no center diff for over a decade now, only a clutch :))
AWD is the future for most for hard terrains, mud, ice etc. Who wants 4*4 low, 4*4 high all that cr.p.
The 2 different Subaru Xmodes makes things a bit different. You didn't talk about it all.
Yeah, I suspect there is a reason the Subaru jacked up wheel test wasn't shown😊
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Unless your front differential on a conventional 4x4 pick up, jeep, ect, has lockers on the front, it's a 3wd..
I have seen 4x4 trucks that have open differentials on the front and rear..
At a very minimum, you need a LTD slip rear differential on a 4x4 truck, or jeep.
Try the one wheel spin with the Subaru like you did with the Audi. I guarantee the car will move.
Most modern awd systems would move easily in a situation like this, that said the current Subaru awd system is very good. Not sure of the year of that Audi but I can't see any newer ones not moving in that scenario
The Audi just needs its 1500 mile reoccurring service, then maybe it will move.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Very surprised you omitted locking differentials.
Is 4WD really better than AWD for a soccer mom to be driving 60mph down a wet or snowy mountain pass?
You would think for a street car driving on slippery curvy roads, AWD sounds like it would be much better rather than locking up all 4 wheels and spin out unpredictably
best video on YT that explains this topic. well done!
Does the Ford Explorer react like the Audi in this video in that if 1 tire is in the air you're stuck and the others won't turn?
Would have like to see the Subaru on the jack.
Yeah, I think the AWD system (if not completely disengaged somehow) would've driven the other wheels without problem. I'm a bit amazed that the Audi didn't have any capacity to do the same?
I've seen tests where a Subaru (and some other brand I can't remember) moved when only one wheel had traction.
Hello! You got it a little bit wrong, newer Subaru's like this don't have a center diff, they have a multi plate center clutch like all awd vehicles, they call it Active Torque Split with a 60/40 default torque split.
Manual Crosstreks use viscous couplings.
Ive seen that same Subaru in your video. Climbing a snow covered mountain side. He went well past where the trucks, had too turn around
I don't think so.
Great video, thanks!
This video confirms that I really fucked up buying an overpriced 4x4 2011 Ford Ranger XLT a couple months ago. Not because it was overpriced, but because I'll relatively rarely get to actually enjoy the benefits of the 4x4. Don't get me wrong, I do really like the truck, but as someone who doesn't off-road and who only gets a few months of snowy weather each year, I really should have purchased something else with either an AWD system or a 4WD Auto system. Oh, and I almost forgot to mention that mine has the open diff, not even the limited slip. Ugh.
It's a bummer, but oh well. The 4x4 has come in handy a couple times this winter. It's just annoying to finally realize that something like a Subaru/Honda/Mazda AWD SUV-type vehicle would be far more practical for my lifestyle.
At least these Rangers hold their value :) I'll give it at least a couple years of owning it before making a change.
Check out the Honda Pilot Touring AWD.
ruclips.net/video/fqtTLSqIiB8/видео.htmlsi=Ka5CwTPSR4IdCjqQ
Thanks for this video. I have one little problem: why didn't you try that back-wheel-in-the-air trick with the Wilderness? My guess is that you know that the Wilderness would have detected the issue and put brakes on that spinning wheel, making the car move forward. Something the old Audi wasn't able to do.
Also, a 4WD system is indeed better offroad than most AWD, but only if they can lock their front and/or back diffs. Without such diffs, other things being equal (tires, ground clearance, etc...) I'd take a modern AWD over that 4WD without front/back lockers.
I agree. He deliberately avoided demonstrating the Subaru Outback on the Jack.
7:58 is that Audi’s door a different color?
Algorithm recommended your channel and happy to subscribe, this was a wonderful video and it was great seeing the 4WD Ram locking up it's wheels.
Didn't know Auto 4WD also depended on clutch packs. I know modern Subarus w the CVT transmission also use a (wet) clutch pack in order to achieve the desired power split; never mind the amounts of software and trickery employed on modern systems to try to simulate locking diffs. It's been interesting to see the evolution of said software packages and the limitations placed on it in some iterations, like 2015 outbacks that although having X-mode(more agressive AWD settings for off road use), seem to be limited by transmission temp as opposed to actual power from the engine.
You could probably make a more detailed video just on variations of AWD systems and I'm sure the comments would be fair and entirely reasonable lol.
Subaru owner for decades, like you said, on the highway or rural roads the Subie keeps traction at speed when you hit an icy spot, or big rain puddle, even wet roads it feels stuck to the pavement. I've driven Subarus in the desert on sandy roads, and snow in the mountains. Happy trails!
What about a full time 4wd system like my jeep trailhawk has. My jeep will act like a truck in 4wd when i turn especially at low speeds. When turning my tires skip and i get the 4wd bind
Show the Subaru with a tire in the air. The new Subarus have individual wheel braking to shuffle power to wheels with traction so one wheel off the ground is no problem just watch videos they are impressive. Subarus awd should be in its own category.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Really missed the boat here. The Honda torque vectoring AWD system is anything but a replica system, it’s a different approach that has a lot of efficiency advantages and still performs quite well. Videos here on RUclips of a Ridgeline going up an icy road with little issue while a 2500 Ram 4wd is just spinning all 4 of its tires.
Dude doesn’t understand the Hondas system
I had a very rare 1990 Mazda MPV, wish I still had it. It was a 5 speed standard, the floor shift had a shift on the fly AWD button in the center of the shift knob. It also had a column shift lever, this was used for selecting hi or low range, and there was a center diff lock switch on this lever. So it had it all, RWD, AWD, 4WD, 2 speed transfer case! Just needed lockers LOL
Before watching the whole video let tell you what I've owned subarus, trucks with 4x4, sedan with fwd, and classic benz with rwd. In the winter full of snow, I can pass slow vehicles every time on the highway with my subaru (legacy and outback) with (cheap tires) without fearing about getting out of control. That's my experience.
Awesome explanation, thank you! I currently have a 2016 ram 1500 and GX460 but my dream is to have that power wagon you have. Lastly, I’m loving the under coating you have. I did same and took 5-6 hours spraying the underbody as well as inside of the frame with PB blasters surface shield.
Great video, man. I appreciate your style and explanation. I'm looking to get a 4x4 so this helps a lot.
Great video! The overheating of driveline clutches is not a frequently mentioned point- great to see you explaining it!
Thats the good thing about Pajeros / Monteros it has an advance 4x4 super select transmission way ahead of it's time, even to some modern vehicles now.
It has full time 4wd (4wd auto) and central locked 4wd (4wd) 4h and 4L.
Some latest 4x4 now their 4h are not true 4x4 but actually 4wd auto. so they can only get the true 4x4 on 4L.
What about the Auto-4WD.. Many people call them AWD. My Jeep is Auto-4WD.. and called the AWD. The AWD Hyundai Tusan.. or what ever its called.. has a locking diff..
Thank you for this lesson, I didn't get it previously !
Where the audi and subaru benefit is in weight. They really have an awd system that is superior to most. Problem is subaru ruined their potential once going cvt. Torque delivery is no where near as good at slow speed crawling. But the weight difference is why they will out climb trucks any day of the week.
Excellent point. In real world situations it's always the big trucks and FWD cars that are stuck in the ditch in winter.
Put one wheel in the air on the subaru and try it. Sure you “mentioned” limited slip diff. But show it.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Nice update. Part time 4wd trucks are problematic for people looking for something that does well in mixed weather conditions, like Subaru and auto 4wd cars/trucks.
Toyota tundra only offers part time 4wd. I think this is true with Sequoia as well. Titan also.
Subaru offers locking center differential.
Exactly, a traditional 4wd system is not great for transitioning conditions while driving on the road. 4wd auto or awd systems are just better for on-road use in most cases. And yes I heard the STI's could come with a full locking center diff
Gen II Sequoia's have 2WD, 4HI, 4LO both unlocked or locked with a center Torsen diff. So you can drive around town essentially in AWD mode. You can also do it in 4LO, which is great for manuvering trailers on grass and not tearing up the ground. It is the best DO-ALL transfer case I have ever used.
I didn't know gen 2 has a torsen center diff. I don't think the gen 3 sequoia has a torsen center diff.
5:42 not exactly, the front and rear axels spin at the same speed when in 4wd. That’s the problem because when turning sharply the rear wheels take a shorter track through the turn. Best example to see this is when a semi truck makes a turn and the rear wheels of the trailer cut the turn short. Since the rear wheels spin at the same rate as the front wheels in 4wd, they have to slip since they’re traveling less distance. Otherwise the rear axel will break since it spins at the same speed as the front axel.
Excellent video, BTW your truck sounds GREAT!👍
Just a good old fashion factory exhaust. but the 6.4 Hemi has that really nice deep tone.
Why didn't you do a fair test with an modern Audi Quattro or do the same jack test with the Subaru? Why did you omit the (arguably extremely pertinent) fact that wheel slipping will be limited electronically with VCD? Why did you omit the fact that a modern Audi or Subaru can overcome loss of traction on not 1, not 2, but up to even 3 wheels?
ruclips.net/video/elFM6qg9rM8/видео.htmlsi=tLQo3WmBsb9IphYM
Viewers should hope that it was a simple oversight on your part, not bias stemming from the ownership of a certain vehicle with a certain drivetrain.
Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
You didn't show the OBW on the 3 wheel test. The OBW redistributes power incredibly.
For use in mud or snow:
A 4WD system with the transfer case locked in and a limited slip rear differential gives you 3WD. One of the front tires can slip.
An AWD system allocates power to 4 tires, so, isn't that better?
If an AWD applies brakes to any slipping tire and if 3 tires are slipping, does that mean you have 1WD?
(A 4WD with limited slip differential in front is pretty rare.)
My 75 f250 was full time 4x4. Eats more fuel, but it can be locked. Locking axle differentials are a big part of the equation too
I love how he shows the subaru vs the truck in the clip art and then proceeds to show the audi vs the truck lol.
As a owner or 4x4 vehicle, I'd say it's easily one the vehicle options ever.
You forgot to mention that modern AWD systems use computerized wheel braking to redirect power to the wheels with traction. Granted, it is not as effective as a true locker, but it does give some additional traction to AWD systems.
The funny thing is so do the AWD cars in the video. Audi has been using an electronic locking system that uses ABS to lock spinning wheels. This guy must have disabled it just to get views.
The Subaru has torque vectoring and when one wheel spins the brake stops and puts power to the other wheels. Not quite locking but it works
Right. And the Audi has a similar system. They must have disabled it for this video.
I believe this part of the video 1:38 is misleading. Honda’s IVTM4 system on Ridgeline and Pilots actually constantly send power to the rear wheels, that’s why their fuel economy aren’t as good as those part time systems found in mainstream subcompact SUVs. Part of the reasons to blame are actually on car companies, 4WD don’t necessarily equates to 4WD, but can sometimes be exactly the same as AWD. Just marketing. Watch Auto Buyers Guide’s channel for more details on this confusing subject
If you want to put that Subaru in X mode and then jacked up the rear end it would have went forward too. Audi Quattro systems aren't what they used to be. They are good but not like they were.
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Ok now i am confused, so what does my 02 Sequoia have? I can have 2wd, 4hi on the go without locking the center diff(AWD) and 4lo with and with out locking the transfer case. I always tought it was a similiar system as the land cruiser.
I don’t know. My 2022 Subaru Forester has xmode which breaks tye spinning wheel and forces power to other 3. Works like a charm. I don’t know what this guy is up too. Probably 10 years old tech or something
Same with the Audi. Audi had locking rear differentials up until 1995 and then they moved to automatic locking using the ABS system in 1996. They must have disabled that system for this test. Unfortunately people like this can spread a lot of misinformation.
Mitsubishi Magna AWD
50/50 split rear limited slip differential with viscous centre coupling
When on the highway it’s more 70 rear 30 front
Same AWD system as Evo6/galant Vr4
All mechanical works great has been on beach and thick mud never gotten stuck yet
Loves wet grassy hills
I like the borgwarner in our h3 adventure.. planetary type diff for 60/40 split rather than clutches for "awd" then fully locking 4hi and 4low when needed along with rear locker.
Had an older "AWD"" SUV that was really 4WD auto. The clutch pack burnt out at 105,000 miles.
What about these Toyota hybrids that have a separate, independent motor on the back axle? Seems as though there is no connection between the front and back axles.
Very nice and clear, yeah I'd like to see a video only for auto AWD system, many brands use for example the haldex which is not that bad in some context.
Someone tell him about Subaru Xmode
If you get a chance, please make a video of AWD in electric vehicles and how that works, its advantages, disadvantages, such as reliability, effectiveness, etc.
Hell yeah buddy, your video are awesome thanks
Happy you like em sir!
My Guy thank you very much for this video one of the bests videos I've seen. I drove my 4x4 on a hard gravel road and felt the high tention torque on system en wheel spinning and though something was wrong and diff locking without turning, this explains thank you
Great explanation. It's hard to beat a 4 wheel drive, except for 4 wheel drive + front and rear lockers!
Bingo, when both diffs are locked on this truck It just goes anywhere (anywhere it can fit lol)
@@GettysGarage Try it with slicks in the snow... Tire grib is king. No grib, no go GI... Take it from one who drove in the snow and snot slick hills of Korea while in the Army. Even 10 wd Duce and a Halves don't go up hill with slick tires.
A failure on xdrive awd is the dependance on wheel speed detection. If an axle breaks, it free spins and and good 3 wheels get no power.
A 4x4 would usually offer a diff lock to keep you crawling.
Our RDX delivers power front and rear, that test wouldn’t work. It also wouldn’t work on the Subaru because of brake vectoring. It would apply brake to the elevated wheel or wheels and put power to the wheels on the ground. Bronco Sport Badlands and Maverick Tremor have a rear clutch that locks the rear putting power to both rear wheels along with brake vectoring.
4WD Auto has improved to the point where most manufacturers completely couple the clutch pack together when set to 4WD Lock, which eliminates slippage and thus any heating or wear for off-road use. Other then cost and complication\more points of failure, the main disadvantage is either size and weight when made tough enough to match the strength of part-time 4WD, or strength and durability when made to fit inside an area designed for a part-time 4WD transfer case.
I would not leave it in full time\auto 4WD while off-road in low to no traction conditions; that mode is really meant for mixed conditions of both high and low traction, like paved roads in poor weather conditions where the clutch pack will be engaging less often and under lower loads.
did you ever press the gas? give it some throttle all examples will try their best. you would be surprised it really depends on vehicle dynamics
An accurate but grossly oversimplified explanation. I couldn't help but notice you left out the electronics completely. Modern all-wheel drive cars have sophisticated sensors that would sense the spinning wheel, lock it, and send power to the other wheels with traction to get the car unstuck. Using computers and sensors, they can do 8-9/10th of what a dedicated 4x4 can do.
That was strange how he left that information out. Audi has had that system in place since 1996 so they must have disabled it for the test in this video.
Excellent video . Good Information
Great explanation. I never knew about "4 WD Auto." Thank you
What’s the difference having a power wagon and a standard ram? Just curious 👀
I see the Ram for hauling trailers and carrying things for handy/worker person. For a daily and commute to work I would prefer the Outback.
Power wagon has a different suspension, comes with a winch and differential lockers, also an electronic from sway bar disconnect for better front axle pivot range for better off road traction/flex
So did you drive your old Ram in 4wd auto all the time or did you drive it in 2wd and only engage the 4wd auto when it may be slippery conditions in some places?
Someone send this link to TFL
Maybe one day I'll be up there with the big dogs!
Your tech knowledge is far superior. I wish I could sub your channel more times. 😂
I think you should clarify the the segment about wheel hop on the Power Wagon. You can drive the Power Wagon on dry pavement in 4WD with no problem because both differentials are open when not locked.But you can’t drive it on dry pavement if the axles are locked. The owners manual states 4WD High can be driven on pavement up to 55 mph. I apologize if I misunderstood what you were saying. That aside, this is a very informative video. Thanks for the great content, as usual.
As far as I know, RAM only uses part-time 4WD transfer cases from New Venture or Borg Warner in their HD trucks. They do not have a center coupling or differential, so they should NOT be driven on dry pavement for long periods of time. Any turning will result in binding because the front wheels take a shorter path around a turn than the rear. It has nothing to do with the differentials in the axles.
Appreciate the comment! So I guess maybe where the misunderstanding is that none of my diffs were locked. Both front and rear were left wide open. The front and rear drive shafts spin at different speeds going into the fully locked transfer case when turning. This results in one wheel being forced to skip.
Fun story, my girlfriend used to drive my PW to work (shorter distance) and I left the truck in 4wd for a thumbnail picture. She called me and said the truck will not move when she turned and she was panicking because she thought she broke something. she took the truck out of 4wd and everything was fine. This was because on dry pavement to driveline was completely binding up.
It's a tough concept the wrap your head around but an AWD system uses 3 differentials and that 3rd diff or center diff takes of that difference in speed of the front and rear driveshaft. where my truck has only two differentials and a locked transfer case instead of a 3rd differential therefore causing binding.
Hello Mr Getty? I guess that's your name...just came to mention also that driving in 4WD generally on tarmac and any hard surface EVEN IN A STRAIGHT LINE will put stress on your driveline. Not just turns and corners. There's always slight differences in wheel speeds between left and right, front and rear axles too. When in 4x4 on hard surfaces this shortens component life
Great video, so is a maverick not a true AWD?
Is the Subaru forester AWD permanent and is it better than Tiguan 4 motion -- can you please do a video comparing 4 motion to the Subaru
My VW Touareg has a center lock for off roading. Other models come with center and rear locks!
Honda's last gen pilot and passport have one of the best awd system for off-roading with torque vectoring power distribution.
You should state that this has changed with newer models of Ridgeline and Pilot.
when that truck is fully locked up, it just keeps rolling. goes anywhere it can fit!
How about what is the difference between 4x4 and 4WD. and if they are the same, why are they named different.
Very informative. Good job. Enough information here to make a decision based on my driving needs.