Death Wobble is also related to how parallel the track bar and the tie rod are. If you look at a stock Jeep they are pretty close to being parallel. When people lift their rigs, these angles change and contribute to death wobble. Like Kirk said, do a tie rod flip, get your rig professionally aligned, and changing out your bushings should cure it. Adding the steering stabilizer will make control minute wobble that you probably won't be able to feel.