Question about 2001 Oldsmobile Bravada
This is a common problem in older 4WD vehicles. They had locking hubs and the transfer case linked the whole drive train, front and rear wheels all together.
This was great for forward motion. It was also great for maneuvering off road. It was a problem on dry pavement if you tried to make tight turns.
When turning, the wheels on the outside of the turn have to travel farther than those on the inside. The tighter the turn is, the more pronounced the difference is.
On 2WD vehicles, the wheels spin independently. It's not an issue.
However if the drive train is locked, tremendous stress is put on it trying to turn the wheels the same amount while traveling different distances.
That j erking is one of the wheels letting go of the pavement and catching up with the other.
This 'binding' can cause radial stress fractures anywhere in the drive line. The weakest link will eventually let go.
See that giant Blazer in my avatar? It had a few weak links I could tell you about.
Anyway, AWD's are supposed to have clutches built in to prevent this from occurring.
If they aren't functioning properly, if the fluid levels are nominal, you really need to get it looked at by a pro.
I hope I've provided you some insight as to what is happening. I hope you find it to be very helpful.
Posted on Oct 11, 2009
The 4 wheel drive transfer case has plastic pieces in it that breakdown over time. This extra junk in the transfer case causes the car to be in 4 wheel drive all the time and makes the car have posi-traction too. So when you go around corners (especially in painted parking lots) the outside tire has to go farther than the inside tire and it skips backward, because the tires are "locked" together. (Watch "My Cousin Vinny" for a better explanation.)
I have read that removing the transfer case, and thoroughly cleaning all of the loose debris out of it and re-installing it fixes the problem. Do not forget to replace the gear oil in the case.
Posted on Oct 11, 2009
It is the fluid in your tranfer case!!!!!!!!!!!!!!!! the clutches in your case are binding and need the fluid replaced to help re-lube them
you need to use AutoTrak II fluid from the dealer.
Posted on Jul 15, 2009
Can the 4wd settings be changed? it's commmon on a 4wd car to **** or jump on a tight turn. instead on the rear tires just pivoting they are trying to move forward. if it has an auto mode or a 2wd mode it might stop jerking. or don't turn so tightly. it's going to wear down the edges of your tires.
Posted on Jun 25, 2009
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Posted on Jan 02, 2017
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