several jeeps both the XK\WK report this issue after the spacer lift is installed. A good number of them report back that the sway bar bushings replaced solved there problems. For the cheap price of these it might be worth doing it just because. I have the same clunk passenger side on mine. It don't bother me any when the part finally has a catastrophic failure I'll know which one it is and then replace it. Stuff being loose was the other most common response I hear. Good Luck bro