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Rear end

2K views 8 replies 3 participants last post by  hoffmanestates 
#1 · (Edited)
I have a 02 wj with quadra dirve and after driving for awhile the rear makes like a grinding noise and rough ride when turning slow,does anybody have any ideas?
 
#2 ·
Sounds as too low friction modifier in the rear diff fluid. If not changed lately, i would do it now and add the right amount of friction modifier to the fluid. If you did change the fluid, then add some friction modifier.
 
#4 · (Edited)
Normally 4 ounces in the rear diff should be enough. Sometimes an already pre-mixed lubricant is used, but its known that it can have not enough friction modifier. So good to know first what they used, before pooring the total amount of 4 ounces in. If the diff is full, you will need to drain some fluid, before you can add the modifier.
After adding the modifier, you will need to do tight figure 8 turns on some empty parking lot or any other suitable space, so that the modifier will be mixed and taken inside the Vari-Lok. It will prevent full lock of the vari-Lok, which is necessary when making (tight) turns and both wheels on the same axle will have different speeds.
 
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