on mine, the rear slip joint kept binding and pushing forward, (went threw 3 bearrings) u can buy the bearring threw spicer at local parts store, but the bearring and rubber holder have to be put in your dodge metal holder. Anyway, i finally fixed the problem, i welded the cap on the end of the front slip joint and put some washers (shims) inside the yoke so it was impossible for the driveline to move forward. Note. u can only do this to the front yoke, lol.