I have a 2000 xj with the RE L/A kit on it, when I hit sharp bumps, like potholes or railroad tracks, I get a very sharp chattering noise on the pass side and the axle feels loose. Its been doing this for a while now but hasn't gotten much worse. Ive had the lift on for about a year and a half now. Ive already changed the track bar bushing, ball joints, and hub assembly, but its still there. It sounds too sharp to be a control arm bushing. What else could it be?? Any help would be greatly appreciated.