I just bought a 2017 Hyundai Tucson with all wheel drive. Can someone please explain how the system works? Thank you
AWD System
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Seems like a great question. Because Apparently Hyundai doesn't know, either:
https://www.hyundai.news/eu/stories/all-wheel-drive-systems-explained/
Where they completely fail to explain it other than saying the center diff is geared and apparently not an em clutch like most cheap systems nowadays (which sounds like a positive).
But they whiff on explaining the rear diff and front, as far as I can tell.
https://www.hyundai.news/eu/stories/all-wheel-drive-systems-explained/
Where they completely fail to explain it other than saying the center diff is geared and apparently not an em clutch like most cheap systems nowadays (which sounds like a positive).
But they whiff on explaining the rear diff and front, as far as I can tell.
If its like a Subaru then you need to keep the tread depth at roughly the same for all 4 tires. A PIA if you ruin a tire with damage that requires a tire replacement.
If it's like most mainstream systems, there's a power take-off (transfer case), drive-shaft, and a set of clutches at the rear differential that takes commands from the traction control system. When the system detects that the throttle is open and the front wheels are rotating faster than the rears, it sends a command to the rear differential to lock the clutches, which sends power to the rear wheels. If its a open diff, you may see one rear spin, while the other does nothing. If it also has a limited slip differential, they'll both get power. I don't know much about Subaru's system, or higher end systems like the ones found in the Nissan GTR and Porsche 911, but they're very different than what you'll find in most other vehicles. My Mazdaspeed 6 had what I described above.
I believe the Hyundai systems decouple when not needed. I've seen a lot of them with different tires front to back.
manicrodder
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My 300 clicks in at 39 degrees or when the wipers are active.
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Most shops can put the replacement in a machine and shave it down.
But as an FYI, big discrepancies in tire tread depth can affect handling and overall balance of the car. It's not just a matter of will you damage the AWD system.
Sir your bill is $100 for that new tire plus $20 to shave it down and look like a used tire with half the tread gone.
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Sounds like a great deal. Your other option is to replace all four.
Losing a tire when all four are well used will always be problematic to replace.
Now you tell me, I have two Mercedes AWD cars.
The sheer epitome of automotive yelling, our lord and savior Scotty!
Some vehicles use the brakes/ABS system to grab that one spinning wheel and shift power to the other side, mimicking a limited slip diff. My Durango had open differentials front and rear but would spin all 4 on snow because of that system.
Why would I listen to Scotty Kilmer? He lives in an area that doesn't see snow or ice
The recommendation is for all cars to at least replace tires in pairs, and use the same brand and model of tires all around. A mismatch of tread depth from front to back with cars that use wheel speed sensors to detect slip, can fool the AWD system. The tires spinning at different speeds due to mismatched diameters can cause the AWD to turn on when not needed and if the discrepancy is too great, to lock out AWD as well as ESC.
Agreed. When you have a non-repairable flat or a blowout it is always better to replace all four tires though. Ok so you were dealt an bad hand so buy a new set of tires.
Yeah and I've changed numerous transfer cases and clutch packs because of that. No warranty if different tyres are used front to back or if the wear difference exceeds 2mm
That doesn't prevent lots of people in his area from buying them, for some reason.
or rust
Is Scotty Kilmer even a real person? Or a computer generated idiot?
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