Your track bar should parallel your drag link.
A little front end shimmy is NOT death wobble. Death Wobble is VIOLENT UNCONTROLLED SHAKING of the front axle.
This is death wobble ------->
http://www.emotoman.com/videos/dw.mpg
Death wobble can be caused by many things.
First, take your steering stabilizer off and throw it away. (that little shock thingy on the drag link) This only masks the issues with death wobble thus causing further wear and tear on parts. You DONT NEED IT UNLESS YOU HAVE 35" + Tires on there.
Second, check your Track bar. If there is ANY play in it, (even 1/32nd of an inch) you need to tighten it, replace the bushings, or the frame mount end (whatever you have aftermarket or stock) You can also check the track bar by having a helper turn the wheels left to right while you observe it. The track bar should SOLIDLY attach the front axle to the frame. As I said above, the track bar should parallel the drag link, with the axle at ride height, at full stuff and full droop.
Third, check your steering linkage. Get under the Jeep and grab the drag link (the rod from the steering box to the passenger knuckle), try to shake it around, if it moves at the passenger knuckle you need to replace it. If it wiggles, or has slop at the pittman arm (steering box side) than you need to replace the tie rod end. Then grab the tie rod (part that connects the drag link to the drivers knuckle) and try to shake it and move it around. If these parts are loose, you need to replace your tie-rod ends. You can also observe this while you have a helper turn the wheels left and right while you observe it.
Fourth, check your ball joints and wheel bearings. Jack each wheel off the ground and try to "wiggle" it by grasping it at both top and bottom, and each side. If it wiggles, you need to replace either the ball joints or bearing. This can be easily checked by further removing the wheel,brake caliper, and brake disc. You should try to move the knuckle up and down or wobble it (ball joints), and then try to wiggle the hub/bearing assembly by grasping it by the flange that the wheel studs mount to. If the flange wiggles, you need to replace the hub/bearing assembly.
Fifth, tire balancing. An imbalanced tire can lead to death wobble.
Sixth, Your steering box. This can be checked by having a helper turn the wheel left and right. Watch for the engagement of the steering shaft and watch the pittman arm turn, if there is play in either, there is the problem. Also, your steering box may be coming apart from the frame. Watch for this too as your helper turns the wheel. You can also try to wiggle the steering box on the frame itself. Check for play at the frame mount and bolts, which may be broken off inside the frame, where you cant see.
Seventh, EXTREME control arm angles. Anything over 3.5 inches of lift on stock-length control arms can cause death wobble, due to the mounting of said arms and the stresses on them.
Eighth, control arms themselves. Check all the bushings at the frame mounts and axle mounts. This applies to both stock arms and aftermarket. If your bushings need replacing, then replace them. The control arms keep your caster angle right so as your other axle components do what they were designed to do. Worn out bushings will be either visually detected, or have a helper put your rig in 4LO and watch the front axle as they drive the vehicle back and forth. If the inital torque really moves the front axle (essentially the pinion) up and down you need to look into bushing or even control arm replacement. (OR a Long Arm kit for those over 3.5 inches on stock length control arms)
Ninth, shocks. Your shocks mushy, bent shafts, or leaking fluid? Time to replace them. Yup, even shocks can cause death wobble. Check the mounting points on the axle, and also at the shock tower. If these are worn out, than replace them.
