I can’t tell if you’re a mechanic or a full on automotive engineer or some mix of the two but you are exceptionally skilled at both explaining and demonstrating the mechanical principles of everything you cover
Excellent. That transfer clutch is from a nissan G35X. I used this in a BNR34 getrag box to eliminate the stock electric over hydraulic system with the electronic system. This enables true 2wd or 50/50 awd but enables me to control the centre diff for some magic results. Launch control being one of many tricks. This has allowed my 350Z to become a supercar
Did anyone get overwhelmed? I was lost shortly after! This guy is so knowledgeable I wonder how long it took him to learn all this stuff. Good to know there are exceptionally knowledgeable and qualified technical mechanics like this gentleman who are able to explain and demonstrate so simply without skipping a heartbeat. Very impressed. Did I mention how explicit he was during the process? Kudos to you, sir!
@@speedkar99 Amen to that, brother. It was a very enjoyable and educational video. Thank you. We have a 1999 AWD Ford Explorer, and I don't think I can get the cover off the front differential without dropping the whole front axle assembly out. But that would mess up the alignment, and I'd have to remove at least one front wheel bearing assembly. The Ford dealer charged me $22 for just one of those "single use" wheel bearing nuts the last time I removed a front wheel! It sounds like the previous owner never checked or changed the fluid. In fact, it sounds like it's dry and already damaged. While watching your video, I realized that there is no differential between the FWD clutch pack and and the rear drive shaft, but, instead, that the two operate in a tandem setup, with the rear differential being directly driven by a continuous shaft from input to output of the transfer case. Now I can go home and take a cutting torch to one side of that front axle and just drop it and the front drive shaft out completely with no regrets or second guessing -- and without changing the alignment. We'll just use the car as a rear wheel drive vehicle. It's too old to waste time, money, and work to repair a feature I've lived without all my life, anyway. Thanks a bunch!
I really can’t put my finger on how or why your videos are so clean/easy to follow. Even if it’s something straight forward and common knowledge, somehow your explanation is cleaner then my internal dialogue. And I usually have no issue understanding me...maybe that’s my problem.
It is good to realize that both the input and output of the clutch pack are rotating at nearly the same speed when driving only the rear wheels. The non-driven front wheels drive the clutch pack via the front differential and shaft. This greatly reduces wear. Nice video. Much better than expensive and often inaccurate 3D animations.
The whole internet is full of writer styles that explain this delicate mechanical gadget as if they are talking to an journalism loving audience. This gentleman, while he gets fully dirty in oil, he moves forth and back from mechanic level to schematic engineering level explanations, through schemes. He is so dedicated to go to the deepest knowledge and show it to us, that he kills the equipment fixers. The video has been quite smartly produced, combining quick, non-boring and non-academic speech with touchable knowledge, saving us from a long video with boring and anemic theories.
Super dooper explanation I’ve got all wheel drive on my RAV4 never really wanted all wheel drive but the model I wanted didn’t give the option of 2 wheel drive but hey ho at least I know how it works now
Great explanation, also video editing and details choosing in your explanation. Normally follow someone disassembling something is hard to follow due to the mechanic to explaining together with the activity. But the way you do is great. Great video. Also answered some questions I had such as "why with so many clutches this system is not hot like hell?" and "if this is a center diff, when opened all torque would go to the front free axle"
are these transfer cases also found in Audis, BMWs and Mercedes Benzs or do these brands use a different technology? What of the SUVs with electrical locking AWD like Range Rovers? Please explain
Many cars have a center differential (planetary "epicyclic" gearset), not just a series of oil-encased clutch plates. Those cars also have the option of locking the center diff (no slippage) and most have a two-speed gearbox ahead of the 4WD setup.
This is slightly different. This is awd not 4wd. Most awd give the driver no options when it comes to controlling which wheels have power. In some rare cases, like the mercedes gwagon, there is an engagable awd based system with lockable diffs rather than 4wd, and i believe old toyota rav4s had an option for awd with a locking center diff, but I could be wrong on that one. Either way, the majority of awd has the computer do everything rather than the driver
So as I see it this is a standard rear wheel drive system with added electrically controlled multiplate oil immersed clutch . In a situation where one may be turning it could transpire that , if the computer decides it needs a 50/50 split, the rear wheels will be covering a shorter distance than the front wheels yet turning at the same RPM thus causing binding of tyres on the road surface with the bunny hops common to solid 4 wheel drive. A much better system would be to incorporate a linear differential with optional lock up.
LOL.. I love your commentary and editing style..here's one for you..a 100% mechanical awd system with the ability to lock any or all tires at need with a Hi/Lo range to boot..hint..only one manufacturer ever did it between 1999 and 2004
Fun fact. That transfer case is almost the same than a Skyline gtr transfer. Just that gtrs has their clutch packs hydraulic actuated instead of with an electro magnet.
Amazing the Prius is as reliable as they are. Shows some serious QC at Toyota. Thanks, great review as always. Nope, still not gonna fly if this is how complicated a "car" is.
Awesome video. AWD systems are pretty simple in engineering and construction but I didn't know a variant of the CVT technology was used in AWD systems like the steel belt. Cool. Is it possible for you to make a video on a teardown of a supercharged engine? Already seen a turbocharged engine.
Your knowledge is extensive. I hope you're making good money doing what you're doing. If not, you should be working for Mercedes, Lexus or Cadillac in an air-conditioned facility with weekends off. I don't work on cars. I love cars and just enjoy learning about how things work. Thanks for sharing your experience. All the best to you.
Seeing this relatively light duty thieving clutch system design it doesn't seem like it would function at its peak for long even being a wet clutch. Good video.
you should do videos on different styles of awd systems. there's a lot of different designs. that'd be really cool! anyways this video is really informative.
Nice video as usual. So say compared to a front wheel based AWD, in this rear biased setup front prop shaft will not be spun by the engine until AWD needs to be engaged right?. Where as in a front wheel based AWD, rear prop shaft will be spun by the transfer case at all times and the clutch packs just before the rear diff is engaged to enable AWD (at least in most FWD car based SUVs)?. Based on that I'd say the rear wheel based AWD setup will likely to be bit more efficient compared to a front biased AWD in normal driving.
This doesn't have a driveshaft disconnect so it'll still spin because the wheels are spinning. Torque just isn't being transferred when the clutch isn't engaged.
If a 2013 Honda CR-V Real Time AWD system is in Drive, will the front wheels of the vehicle roll backwards while the vehicle is in Drive? Or will the front wheels only roll backward when the vehicle is in neutral? (This is not a CVT transmission)
@@speedkar99 Not sure. There is a debate whether you can tow a 2013 CRV AWD backwards while it's in Drive. People say all 4 wheels will spin freely in any gear except Park. Wondering if you know if this is true. I say front wheels won't spin freely and you'd break the driveshaft or damage something towing backwards while in Drive. What do you think?
I just don't understand how a clutch can control torque distribution between the front and rear axles in this way. Surely the only way a clutch can vary torque is when the input and output shafts are turning at different speeds (like setting off from stationary in a manual car) the clutch can allow more or less slippage between the clutch plates, and therefore between the two shafts, to transfer more or less torque. However when a car is driving along a straight road there is no difference between the rotational speed of the front and rear wheels so the input and output shafts are rotating at the same speed so it doesn't matter whether the clutch is 10% locked or fully locked (or anywhere in between) there is no slip between the clutch plates, so how does the clutch have any effect?
I was wondering the same! And also: how can these small clutches sustain so much constant slipping without getting red hot and welding together or even explode in tiny metal fragments? Hopefully someone can shed some light on these questions :) thanks! Great video by the way, as always!
@@qnaap having sat and thought about it I am guessing that the answer is as follows: Whenever all the wheels are turning at the same speed there is no controlled torque split, it simply defaults to a fixed split. The controlled torque split only occurs when there is a difference in front/rear wheel speed (which is a lot of the time on many roads i.e. ones with corners). And since this speed difference (due to corners) is typically only ever very slight, that is why the clutch pack is able to operate without destroying itself. If you do drive on slippy surfaces and get significantly different front/rear speeds it does start to damage the clutch and that's what the temperature sensor is there to detect. Does this sound like a viable explanation? (If it is, it was only your question about why the clutch doesn't burn out that made me think of it!!) Edit: just thought, it also acts as a central differential as well, as long as it isn't 100% locked. Wow, it's unbelievably simple, and clever!
@@pjay3028 the way you explain it does sound very likely to be true! So cool to see how effective such small components can be, considering the things you can achieve with these vehicles. Change your oil, kids :)
Since there is no "real" center differential for this AWD setup, does the computer have to engage in adjusting those clutch plates all the time when the car is not moving in straight line?
There are 4wd version that only kicks in the rear wheels if the front wheels are spinning. You get the fuel economy of front wheel drive, and you get 4WD if you need it. It's not as good as permanent AWD though
i imagine most of the time you’re not sending all 50% of the torque to the front wheels. so by sending less than that, does that lead to premature wear on the clutch packs since you’re constantly allowing for slippage?
It's not slipping unless your rear wheels are spinning on ice and fronts are locked. The shafts move more or less at the same speed since the wheels move at the same speed.
I have a friend who left a spare tire on the front of a Volvo S60 AWD. Would it be worth it to pull the trans and rebuild it. And what part of it went bad in the process?
Would you happen to have a video on how the AWD system works on the Lexus IS/GS/RC? I know it's a planetary gear set with a clutch pack as a limited slip diff, but I'm unclear on how the default torque split (30% front 70% rear) is achieved. Is it done entirely by gearing inside of the transfer case, without the use of a clutch pack? Does this mean that even if the clutch pack is no longer functional, it'll still be full-time 30/70 AWD?
Really great content! It's as equally informative as it is entertaining. I'm also glad that you only use the highest quality tools such as the "state of the art rotary snap ring remover", and the "precision Oral-B teaching pointer".
This is the vid i was waiting for sir! I have my awd fuse removed in my g35 effectively making it full time rwd. Always wondered if there is any sort of damage and this explains it. Thank you
Yeah my brother rigged a switch to his G37X HR's AWD ECU to cut it off and turn it into a RWD at the flick of a switch. It also disabled traction/ABS so it's a really fun switch 😉
You should take apart a knocking or seized Hyundai/Kia 2.4 Theta II GDI and show why they fail. They usually blow up on the highway, and sometimes a connecting rod explodes into the oil pan and/or through the block. We replace these engines all the time.
OK this is a long shot but I recently bought a used 2011 Nissan Murano AWD and the previous owner told me that the transfer case needs to be changed because there is a grumbling sound that happens when I put the vehicle in drive and let it roll from idle alone, but this grumbling goes away once I accelerate above 7 or 8 mph. one mechanic recently noted that there was some play where the driveshaft meets the rear differential. I just don't know who to believe, as the previous owner's mechanic said it was the transfer case and the mechanic I went to see for an unrelated issue said there was some abnormal play at the rear differential. Apart from that there are no issues with the trransmission. Any thoughts as to what it could be? Thanks
This is fantasactic!! My 2006 M35X has the same ATTESA system and is awesome. Does the "Snow Mode" lock it 50/50 to a certain speed? Loving your channel.
Its impressive how easy it is to understand this man, especially considering the speed at which he speaks, must be some kind of mechanical witchcraft
Thanks I'm glad you appreciate my style
@@speedkar99 I'm glad you work hard on making these videos accessible and in-depth enough for all, keep up the good work man
I agree
I have to put at .75 speed. Only way I can catch up
I think it has something to do with the toothbrush he uses to point the parts, haha.
I don't know why, but I smile whenever I see your old toothbrushes. I appreciate your sharing of knowledge. Keep up the good work!
Awesome thanks! Glad you could learn something
@@speedkar99 so not all awd cars have center differential?
I can’t tell if you’re a mechanic or a full on automotive engineer or some mix of the two but you are exceptionally skilled at both explaining and demonstrating the mechanical principles of everything you cover
I have my special snap ring removal tool and I am heading to my neighbors AWD Cadillac to see if this tear down is accurate...
Please keep me updated I've never opened a GM
@@speedkar99 I had to rethink the process, his watch cat was out.
Just use an angle grinder.
Special snap ring removal tool such as toothbrush like in this video?
@@CatarineausArmory lol easy man..
This is an old school youtube video. No self promotion , like subscribe bullshit. Just straight information, keep it up. love it
Thanks. I like to keep things simple and to the point. That being said.... Subscribe please 😉
Excellent. That transfer clutch is from a nissan G35X. I used this in a BNR34 getrag box to eliminate the stock electric over hydraulic system with the electronic system. This enables true 2wd or 50/50 awd but enables me to control the centre diff for some magic results. Launch control being one of many tricks. This has allowed my 350Z to become a supercar
Is this bolt on BNR34 Getrag transmission?
This guy explains concepts better than any other channel, and sounds like a better engineer than Engineering Explained
It's better to see real things and learn than draw it
You speak like somone run after you.is to fast
Did anyone get overwhelmed? I was lost shortly after! This guy is so knowledgeable I wonder how long it took him to learn all this stuff. Good to know there are exceptionally knowledgeable and qualified technical mechanics like this gentleman who are able to explain and demonstrate so simply without skipping a heartbeat. Very impressed. Did I mention how explicit he was during the process? Kudos to you, sir!
Thanks im glad you appreciate all the details
"State-of-the-art snap ring removal tool" lol
Hilarious
Hahahahahah, yeah, state of the art 😅
You gotta love this guy. He doesn't beat around the bush, doesn't mince words.
Why waste time??
@@speedkar99 Amen to that, brother. It was a very enjoyable and educational video. Thank you. We have a 1999 AWD Ford Explorer, and I don't think I can get the cover off the front differential without dropping the whole front axle assembly out. But that would mess up the alignment, and I'd have to remove at least one front wheel bearing assembly. The Ford dealer charged me $22 for just one of those "single use" wheel bearing nuts the last time I removed a front wheel!
It sounds like the previous owner never checked or changed the fluid. In fact, it sounds like it's dry and already damaged.
While watching your video, I realized that there is no differential between the FWD clutch pack and and the rear drive shaft, but, instead, that the two operate in a tandem setup, with the rear differential being directly driven by a continuous shaft from input to output of the transfer case. Now I can go home and take a cutting torch to one side of that front axle and just drop it and the front drive shaft out completely with no regrets or second guessing -- and without changing the alignment. We'll just use the car as a rear wheel drive vehicle. It's too old to waste time, money, and work to repair a feature I've lived without all my life, anyway. Thanks a bunch!
Why is this guy not having 2 million subscribers yet, because his videos are worth that much and more.
I wish! Maybe soon, please share! Thanks
I really can’t put my finger on how or why your videos are so clean/easy to follow. Even if it’s something straight forward and common knowledge, somehow your explanation is cleaner then my internal dialogue. And I usually have no issue understanding me...maybe that’s my problem.
It is good to realize that both the input and output of the clutch pack are rotating at nearly the same speed when driving only the rear wheels.
The non-driven front wheels drive the clutch pack via the front differential and shaft.
This greatly reduces wear.
Nice video. Much better than expensive and often inaccurate 3D animations.
They have to rotate the same speed almost all the time otherwise the clutch will wear out.
Wow! Mechanical Genius + Expert Communicator + Flawless Editing = Perfect Video!
It’s the subtle touches of humour that make this channel so great
The whole internet is full of writer styles that explain this delicate mechanical gadget as if they are talking to an journalism loving audience. This gentleman, while he gets fully dirty in oil, he moves forth and back from mechanic level to schematic engineering level explanations, through schemes. He is so dedicated to go to the deepest knowledge and show it to us, that he kills the equipment fixers. The video has been quite smartly produced, combining quick, non-boring and non-academic speech with touchable knowledge, saving us from a long video with boring and anemic theories.
Dude this video is INCREDIBLE
I google searched for 20 minutes to get a vague ideo of how this worked but you told me so clearly in amazing fashion
Is that your brother's old cardboard?
One of the most underrated channels. I wish you make it big. 😊
I hope so too. Thanks
Newer 4WD transfer cases do allow for slippage for use on highways at high speeds. My truck currently allows for use of 4WD up to top speed ~98 MPH
What car?
Really interesting, thank you!
And the editing is perfect as always.
The video isn't to long or to short 👍🏽
That's my style! Thanks
too long or too short is correct
My cardboard studio. LMAO
He is a humble man somehow......
Love your breakdowns and explanations, i look forward to seeing you put it together one day! :-D
Not with that snow ring removal tool!
@@speedkar99 sorry boss
02:32 You hit it and it started bleeding.
It's early in the morning and I'm a lil loopy, don't judge me.
Super dooper explanation I’ve got all wheel drive on my RAV4 never really wanted all wheel drive but the model I wanted didn’t give the option of 2 wheel drive but hey ho at least I know how it works now
Great explanation, also video editing and details choosing in your explanation. Normally follow someone disassembling something is hard to follow due to the mechanic to explaining together with the activity. But the way you do is great. Great video.
Also answered some questions I had such as "why with so many clutches this system is not hot like hell?" and "if this is a center diff, when opened all torque would go to the front free axle"
State of the art snap ring removal tool. I just love it!. This guy is AWESOME!
One of the best car videos I've seen
Thanks. What about it makes it the best ?
@@speedkar99 don't push it
You are really good at communicating in these videos
Glad you appreciate my video style
It’s such a simple but yet interesting system
Yea interesting indeed. I'd love to see more complex setups
Thats the real What's Inside channel.
Yes Thanks
are these transfer cases also found in Audis, BMWs and Mercedes Benzs or do these brands use a different technology? What of the SUVs with electrical locking AWD like Range Rovers? Please explain
Many cars have a center differential (planetary "epicyclic" gearset), not just a series of oil-encased clutch plates. Those cars also have the option of locking the center diff (no slippage) and most have a two-speed gearbox ahead of the 4WD setup.
This is slightly different. This is awd not 4wd. Most awd give the driver no options when it comes to controlling which wheels have power. In some rare cases, like the mercedes gwagon, there is an engagable awd based system with lockable diffs rather than 4wd, and i believe old toyota rav4s had an option for awd with a locking center diff, but I could be wrong on that one. Either way, the majority of awd has the computer do everything rather than the driver
Yep those are a different setup
So as I see it this is a standard rear wheel drive system with added electrically controlled multiplate oil immersed clutch .
In a situation where one may be turning it could transpire that , if the computer decides it needs a 50/50 split, the rear wheels will be covering a shorter distance than the front wheels yet turning at the same RPM thus causing binding of tyres on the road surface with the bunny hops common to solid 4 wheel drive. A much better system would be to incorporate a linear differential with optional lock up.
These clutches allow some slipping
best AWD tutorial ever made! 👍
Thanks
Id like to see a video like this but with proper 4x4 transfer case, like patrol, land cruiser, wrangler, defender that kinda thing
LOL.. I love your commentary and editing style..here's one for you..a 100% mechanical awd system with the ability to lock any or all tires at need with a Hi/Lo range to boot..hint..only one manufacturer ever did it between 1999 and 2004
I appreciate my Outback even more now. Thanks for the tutorial...now put it back together, lol.
Haha
This guy is fast and furious, great video and a great job!
Best presentation with a toothbrush I've ever seen.
Thanks. Teach-brush does it again
That was damn interesting. I remember the early ones kept burning out the clutch!
This man is the most proffesional one that I have ever heard But as I have always mentioned, he must be a bit slower while explaining the things
while playing back the video, you can click the gear icon, a menu will appear in which you may set playback speed
I try not to waste time and edit my videos where my viewers can benefit from the most efficient information density
"how an AWD system works *in your car!* "
It doesn't. Not in my car, anyway. ;-)
My car doesn't even have AWD.:)
My 04 G35X has 208k and it's still going strong. First awd car I've owned, it's just a p.i.t.a. to work on.
It's very intresting... I smiled 🙂!
Thanks
Fun fact. That transfer case is almost the same than a Skyline gtr transfer. Just that gtrs has their clutch packs hydraulic actuated instead of with an electro magnet.
Yep it's the same ATTESA AWD system
My brothers tshirt and my wifes toothbrush...I love your channel bro.
Amazing the Prius is as reliable as they are. Shows some serious QC at Toyota. Thanks, great review as always. Nope, still not gonna fly if this is how complicated a "car" is.
Outstanding explanation. I was hoping you'd describe the clutch pack as a sangwich! Thanks for another great video
Sangwich 🤣
Awesome video. AWD systems are pretty simple in engineering and construction but I didn't know a variant of the CVT technology was used in AWD systems like the steel belt. Cool. Is it possible for you to make a video on a teardown of a supercharged engine? Already seen a turbocharged engine.
you can watch how is manufactured supercharged car and play it in reverse
Thank you for the video, very clear and intuitive
Thanks glad you enjoyed it
My teeth never felt more clean.
Can you put it back together?
Not with that snap ring removal tool 😉
@@speedkar99 well that's what I thought when first saw it 😆
Your knowledge is extensive. I hope you're making good money doing what you're doing. If not, you should be working for Mercedes, Lexus or Cadillac in an air-conditioned facility with weekends off. I don't work on cars. I love cars and just enjoy learning about how things work. Thanks for sharing your experience. All the best to you.
I enjoy learning how things work and Sharing with the community here. Making money would be a welcome bonus... someday
Great teardown, this is a alot simpler than I thought and it has a backup. You still get rwd if the clutch fails.
@@steph_tsf good observation
I must say, you don't mess around. You tear into everything.
They made vehicles too complicated and expensive.
Amazing all the parts on a vehicle.
Best car channel that I know on RUclips!
I love those old T-shirts that you use lol pretty universal. Thanks for Video man👍
Seeing this relatively light duty thieving clutch system design it doesn't seem like it would function at its peak for long even being a wet clutch. Good video.
Happened upon your channel. Glad I did-very good explanation of something I’ve been curious about.
Glad you enjoyed it
Some people are just made to teach 🤙🏽good job meng
Thanks
Nice one, thanks for that, it's so much easier when someone else does all the cutting and grinding
Can't really see myself needing to know all this info but it's still interesting to watch.
Very good explaination! Enjoyed the lesson. Always wonder what separated a 4 wheel drive from a all wheel drive. Thanks for making this video.
Very welcome! Check out my 4WD video next to see the difference
you should do videos on different styles of awd systems. there's a lot of different designs. that'd be really cool! anyways this video is really informative.
Yeah that would be sweet if I could get transfer cases from all of them
Man, I love how how concise this video is, plus the old tee shirts and special tools make it funny too. Keep it up!
Always a master of teaching !
You Are doing great in all your Videos. Keep up the good work 👌🙂
Thanks I'm glad you appreciate it
Really great video! explained things so well!
Thanks!!
Nice video as usual. So say compared to a front wheel based AWD, in this rear biased setup front prop shaft will not be spun by the engine until AWD needs to be engaged right?. Where as in a front wheel based AWD, rear prop shaft will be spun by the transfer case at all times and the clutch packs just before the rear diff is engaged to enable AWD (at least in most FWD car based SUVs)?. Based on that I'd say the rear wheel based AWD setup will likely to be bit more efficient compared to a front biased AWD in normal driving.
This doesn't have a driveshaft disconnect so it'll still spin because the wheels are spinning. Torque just isn't being transferred when the clutch isn't engaged.
Oral-b should be sponsoring your videos.
If a 2013 Honda CR-V Real Time AWD system is in Drive, will the front wheels of the vehicle roll backwards while the vehicle is in Drive?
Or will the front wheels only roll backward when the vehicle is in neutral?
(This is not a CVT transmission)
Didn't Honda have that transmission problem with those generation CRV and fake AWD
@@speedkar99 Not sure. There is a debate whether you can tow a 2013 CRV AWD backwards while it's in Drive. People say all 4 wheels will spin freely in any gear except Park. Wondering if you know if this is true.
I say front wheels won't spin freely and you'd break the driveshaft or damage something towing backwards while in Drive.
What do you think?
Thank you for the video. I would love to see how A Subaru all wheel drive works and see all the internal parts.
That would be neat to see
I just don't understand how a clutch can control torque distribution between the front and rear axles in this way. Surely the only way a clutch can vary torque is when the input and output shafts are turning at different speeds (like setting off from stationary in a manual car) the clutch can allow more or less slippage between the clutch plates, and therefore between the two shafts, to transfer more or less torque. However when a car is driving along a straight road there is no difference between the rotational speed of the front and rear wheels so the input and output shafts are rotating at the same speed so it doesn't matter whether the clutch is 10% locked or fully locked (or anywhere in between) there is no slip between the clutch plates, so how does the clutch have any effect?
I was wondering the same! And also: how can these small clutches sustain so much constant slipping without getting red hot and welding together or even explode in tiny metal fragments? Hopefully someone can shed some light on these questions :) thanks! Great video by the way, as always!
@@qnaap having sat and thought about it I am guessing that the answer is as follows:
Whenever all the wheels are turning at the same speed there is no controlled torque split, it simply defaults to a fixed split. The controlled torque split only occurs when there is a difference in front/rear wheel speed (which is a lot of the time on many roads i.e. ones with corners). And since this speed difference (due to corners) is typically only ever very slight, that is why the clutch pack is able to operate without destroying itself.
If you do drive on slippy surfaces and get significantly different front/rear speeds it does start to damage the clutch and that's what the temperature sensor is there to detect.
Does this sound like a viable explanation? (If it is, it was only your question about why the clutch doesn't burn out that made me think of it!!)
Edit: just thought, it also acts as a central differential as well, as long as it isn't 100% locked. Wow, it's unbelievably simple, and clever!
@@pjay3028 the way you explain it does sound very likely to be true! So cool to see how effective such small components can be, considering the things you can achieve with these vehicles. Change your oil, kids :)
i'm pretty sure toothbrush is the real boss here.
amazing video the only thing missing is i wish you would have showed how many wires were in that harness
Why?
@@speedkar99 I'm interested in possibly putting something like that on a vehicle that wouldn't originally have one
Since there is no "real" center differential for this AWD setup, does the computer have to engage in adjusting those clutch plates all the time when the car is not moving in straight line?
Some difference in wheel speed is allowed through clutch slippage
Great video! Enjoyed every second of it.
Thanks
Excellent Video. You are a gifted explainer. Thank You!!
And the most important thing of them all.... your brother's T-shirt !!!!
Going to stick to 2WD after seeing this.Very interesting.
There are 4wd version that only kicks in the rear wheels if the front wheels are spinning. You get the fuel economy of front wheel drive, and you get 4WD if you need it. It's not as good as permanent AWD though
i imagine most of the time you’re not sending all 50% of the torque to the front wheels. so by sending less than that, does that lead to premature wear on the clutch packs since you’re constantly allowing for slippage?
They aren't slipping since the front and rear wheels more or less move at the same speed
Thanks for sharing your thoughts and great videos
I would think that the control clutch would wear out... were it to be allowed to slip for any length of time.
It's not slipping unless your rear wheels are spinning on ice and fronts are locked. The shafts move more or less at the same speed since the wheels move at the same speed.
I have a friend who left a spare tire on the front of a Volvo S60 AWD. Would it be worth it to pull the trans and rebuild it. And what part of it went bad in the process?
So did it burn the transmission??
@@speedkar99 yeah it cooked it. Anyone who leaves a donut spare on a car for more than a week can end up cooking the wet clutches.
Awesome explanation and simplifying it!!!
Would you happen to have a video on how the AWD system works on the Lexus IS/GS/RC? I know it's a planetary gear set with a clutch pack as a limited slip diff, but I'm unclear on how the default torque split (30% front 70% rear) is achieved. Is it done entirely by gearing inside of the transfer case, without the use of a clutch pack? Does this mean that even if the clutch pack is no longer functional, it'll still be full-time 30/70 AWD?
I'd be interested to study this myself.
Your vids are the best. Very informative and entertaining. Thanx, brother. 👍
All clear awd
Very good
Nice job
I am Indian boy 👦
Thanks
Good video 👍😊
You put alot of effort into making these so you definitely deserve a like 👍🏻💜💜
Really great content! It's as equally informative as it is entertaining. I'm also glad that you only use the highest quality tools such as the "state of the art rotary snap ring remover", and the "precision Oral-B teaching pointer".
This is the vid i was waiting for sir! I have my awd fuse removed in my g35 effectively making it full time rwd. Always wondered if there is any sort of damage and this explains it. Thank you
Is it the G35 hr or de ?
@@automotivetv9861 de
@@octacore9976 can you do the same to the hr?
@@automotivetv9861 it works on 04-06 g35x. And i think those all are de but i dont think it has anything to do with de/hr
Yeah my brother rigged a switch to his G37X HR's AWD ECU to cut it off and turn it into a RWD at the flick of a switch. It also disabled traction/ABS so it's a really fun switch 😉
You should take apart a knocking or seized Hyundai/Kia 2.4 Theta II GDI and show why they fail. They usually blow up on the highway, and sometimes a connecting rod explodes into the oil pan and/or through the block. We replace these engines all the time.
I heard about the theta2 motors. I'd like to get one someday.
@@speedkar99 The 2.0 Turbo version of the Theta II is much beefier. They are still under the same recall but don't blow up as often.
I would be interested to know how much Amps the electro magnet draws when engaging the clutches?
Yeah
So how would you make a car permanently AWD? Would you need to get a transfer case and put it in the transmission?
Just short the solenoids to lock up the clutch?
Absolutely great video exactly what I needed to learn about awd
I do like Roti and its good to see another way of making it!
Great information. Very easy to understand and simple description. Great job!!
I really enjoy watching your videos......you are excellent at explaining the inner workings......👋😷👍
OK this is a long shot but I recently bought a used 2011 Nissan Murano AWD and the previous owner told me that the transfer case needs to be changed because there is a grumbling sound that happens when I put the vehicle in drive and let it roll from idle alone, but this grumbling goes away once I accelerate above 7 or 8 mph. one mechanic recently noted that there was some play where the driveshaft meets the rear differential. I just don't know who to believe, as the previous owner's mechanic said it was the transfer case and the mechanic I went to see for an unrelated issue said there was some abnormal play at the rear differential. Apart from that there are no issues with the trransmission. Any thoughts as to what it could be? Thanks
This is fantasactic!! My 2006 M35X has the same ATTESA system and is awesome. Does the "Snow Mode" lock it 50/50 to a certain speed? Loving your channel.
Yes, snow mode is only 50/50 for up to 10mph. After that it's basically just fwd assisted at 80/20.
My favorite toothbrush mechanic/engineer