We had serious death wobble in our Cherokee at speeds when we hit a bump. Turned out that the front lower control arms were at too drastic an angle; we bought and installed lowered control-arm brackets from R.E. That completely fixed the problem.
Oh, and all the other stuff listed here: checking for loose steering, tire balance, camber/castor, track bar, etc. were always in perfect condition, so that's what made us start looking at the geometry of the front end.
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