Rear End Failure

[hbalek]

I'm wondering if this is some kind of alignment issue (or rather misalignment) of the drive shaft , diff mounts, etc, basically everything connected to the diff. Unless you won the worst lottery and got two terribly defective rear diffs I'm at a loss. Where the bearings screwed at all, which could/would cause such issues.

Misalignment of the driveshaft to the diff would cause vibrations, noise, premature failure, wear, etc

I specifically asked my service department to check my driveshaft after 2 failed PTU's and RDU's. They found nothing with that but said the RDU had the wrong gear ratio. Mine is driving great now after a 4-wheel alignment and proper gear ratio differential.

 

[musclecarman39]

My rear differential and transfer case/ptu were replaced back in early June at about 50,000 miles. The transfer case failed again just 3 months later. I think the differential is bad again too.

Just had my rear diff replaced again for a howling noise at 45 mph. My 21 has 35,000 miles on it. Only had 700 miles on the 1st rear diff replacement. Picked it up from the dealership, had a very bad vibration, jerking and "bucking". Took it back and now the transfer case is being replaced...wth