Trackbar - Check to see if your axle is out of center (if the axle sticks out farther on the driver side than the passenger). This is caused by a trackbar that is too short. Also check that your trackbar is tight, and the mount holes have
not "wobbled out". Verify that your track bar bushings are good, and don't have any slop in them.
If you have lifted your Jeep but have not installed a longer trackbar, you'll normally find that the trackbar is doing two things pulling the axle over to the driver's side, and pulling the front of the Jeep down.
View attachment 5039
Inspecting the Trackbar:
One way to test for wear in the trackbar bushing / bolt is to have someone start the Jeep, engage the parking brake and put it in neutral (park for an auto).
Lay down in front of the Jeep. Focus on the bolt that goes through the bushing where the track bar mounts in the bracket there on the passenger side.
Now have your driver rock the wheel back and forth. Not a lot, just like: 2 - 10 - 2 - 10 - 2 - 10
As you watch that bolt, does it move at all? Does the front of it stay in place, but the back moves? Does the bushing give noticeably before "catching" and then shifting the Jeep? If any of that is happening, then the BACK side of the bolt hole is likely no longer circular or the bushing is just plain worn out. This happens often on TJs and XJs. Tragic flaw. Once that happens, the trackbar no longer has a good stiff mount and even that little amount of give is enough to translate upstream and cause death wobble.
View attachment 9175
You should also look at the other end (the frame side) of the trackbar for similar movement.
More info on a Wrangler trackbar install here:
http://www.jeepz.com/forum/suspension/29198-jeep-track-bar-install.html