it is alot better than it was so im happy now. just need to move on to the saggy rear springs. i have decided on a RC 3" lift with new spring packs.

 

I got OEM style motor mounts that came from some Korean parts house. I wanted the BDI ones, but man are they expensive. Hopefully by the time I chew these up, I'll have enough $$ for the BDI set.

 

I put the new motor in back in what may or something and mine already need to be replaced..The aftermarket Korean made ones just don't last..

 

What did it end up being?

 

most of it was the 10 year old U-joints.

 

I am on my second xj, now with 200k on the clock. My fist xj was a 1996 xj country 4.0 4x4, and it had 40k on the clock, and it did the same thing. At highway speeds when you let off the gas then back on , it sounded like a clunk from the rear. I have never known an xj not to do this. I attributed it to the rear sway bar loading up under torque.
It always sounded more like a thud to me. After inspecting the rear ends, and replacing with high quality ujoints, the problem persisted. Even inspected axel end play, and center carriers, nothing was wrong. Just make sure to check axel end play. I had a rear end go out on me last year and the end play was like 1/2 inch. The jeep would sway excessively during highway asphalt twisties.
Coloradoxj