I am having a similar problem with my 2000XJ. I have a Rusty's 3" lift and 30's. Steering damper is leaking. Will be ordering a new one this weekend. Just received a Rusty's heavy duty track bar with lowered track bar bracket. Super beefy. Instead of the ball joint end, it has the eyebolt socket. I will install it this weekend and let you know how it feels. The XJ rode great with the new front coils, but when I put in the 2" front spacers to level the truck, I got the Death Wobble something feirce. Took the spacers out and it still does it. Hoping this will cure the problem. Been too nervous to drive on the highway for almost 2 months now. Any other suggestions will be greatly appreciated. Will be in touch.
D