Differential angle

[coldtaco]

Hi all, first a little back ground. I installed a higher lift lift kit on my BJ-70 and now seem to have more mechanical noise when I reach 52mph and above. I'm thinking that maybe the angle of the rear drive shaft is too much now. So, I saw some angled shims on Spector Off Road and was wondering if it would be OK to put some of these shims on to rotate the axle upward just a little bit. I know this will not help the angle at the transfer case but maybe it will be enough to get rid of this noise. Thanks.

 

[Ron R]

Hi all, first a little back ground. I installed a higher lift lift kit on my BJ-70 and now seem to have more mechanical noise when I reach 52mph and above. I'm thinking that maybe the angle of the rear drive shaft is too much now. So, I saw some angled shims on Spector Off Road and was wondering if it would be OK to put some of these shims on to rotate the axle upward just a little bit. I know this will not help the angle at the transfer case but maybe it will be enough to get rid of this noise. Thanks.

If you compare the centre-line of the pinion-shaft with the centreline of the transfercase-output shaft, then these lines should run parallel to each other as much as possible.
If you need shims to obtain that, do so. But make also sure that the u-joints are aligned properly.
When you look at the drive-shaft, the forks of the shaft and the moving part (that sits on the splines of the driveshaft) should be in the same position. If necessairy take off the moving part and rotate it untill the forks line up. Then re-install on the splines.