so I just installed a 3 inch rustys lift kit on my 1994 Jeep Cherokee XJ, and when I first pulled out to test drive, immediately there was a thumping in the tcase/transmission. I have a manual, and I could feel the thumping on the shift stick. I initially thought it was a driveshaft vibe, but I believe those only happen at certain ranges of speeds, never as you are just starting to move. this thumping would happen going forward, back, in neutral or not. it seems like a thump only happen every some amount of turns of the driveshaft, as I speed up, the rate of thumping increased. any ideas? I was initially thinking that I would just drop the tcase, but now I'm not so sure.