Death Wobble: Know it, understand it, fix it

[guitarshredder7]

Excellent write up. I’ve been having some issues with my front end lately. I have full adjustable control arms front and rear. About 4 inches of lift and 37’s. The rear axle is DEAD even in terms of thrust and centering. The front axle is also centered. I have synergy steering as well as their track bar. Drag link is flipped and the track bar has the taller bracket to accommodate the raised geometry. I took it to an alignment shop. (Groan). However, afterwards, I got pretty bad death wobble. I fixed the caster (down to 4ish degrees) and this removed most of the death wobble. What I found, is my jeep started pulling to the left ever so slightly. Steering wheel is centered. At slow parking lot speeds, if I just let the clutch out and creep forward, with no hands on the wheel, the steering wheel starts to rotate left about 1/8th of a turn. Then it just stops and finds it’s “happy spot”. I then found that I had a slight bit of cross caster. Corrected this as well and now it doesn’t really do it anymore but the jeep wanders just a tad bit. It also has a slight pull left under hard acceleration and pull right under braking. But I’m attributing this to geometry and the physics (hypotenuse-drag link-pushing/pulling as suspension loads/unloads in the front). This isn’t my first jeep. So I know what to expect in terms of drive ability. My only question really is, is this normal? What else should I look at? Everything has been torqued to spec. Just trying to make sure I have all my t crossed and i’s dotted.

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