Quote Originally Posted by stx4wheeler View Post
Did you shim the axle to put your pinion angle back to factory? The shims go under the leaf springs in the rear.

Possibly a bad u-joint. Did you grease the u-joints when you installed the driveshaft?

The gear oil didn't cause the problem.
Yes, the ujoints were greased, and yes the shims were put under the leafs on the axle.