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· Knows a couple things...
2004 Wrangler TJ, 42RLE auto trans. F/R lockers, 5.38 gears, Warn Winch, Currie 4" Suspension
50,143 Posts
That's not a bump steer issue, bump steer is something else entirely. What you're experiencing is commonly called "Death Wobble" which is generally caused by no single cause, more a combination of problems.

A common cause is a combination of any several of the following: imperfectly balanced tires, loose trackbar (lower trackbar bolt should be tightened to 55 ft-lbs), bad/loose bushings, bad ball joints, bad/loose control arm bushings, improper toe-in (set it to between 1/16" and 1/8"), caster angle grossly off (it should be somewhere close to 4.5 to 5.5 degrees for your 4" lift), loose shocks, bent wheels, etc.

Death Wobble is a problem that exists with any solid axle so it happens with Jeeps, Fords, Dodges, etc. :eek:
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