Tell us more about your rig. Does it have a lift kit on it? How long are the shackles? What size and kind of tires?
I've read a lot of posts about "Death Wobble". That is what this sounds like. This is usually caused by long shackles and not enough caster in the front end alignment. Other causes are worn front end parts, worn wheel bearings, loose lugs, bad tires, steering and alignment. The usual problem is alignment caused by lifting the body/suspension imporperly. The problem is often masked by use of steering damper. If you get a new steering damper the problem will probably go away, but that really only masks the problem which should be addressed.
PS - do a search on "death wobble" for more input. This is very common.
85 CJ7 4.0L/SM465/Dana300/AMC20/Dana30, MPFI,154K miles - 33" 12.5's Pro Comp MT's, one piece axles, Detroit Softlocker rear, Lock Rite front, Warn Hubs, 4.56 R&P, 4" BDS lift, Warn x8000i, Warn winch guard, Hi-Lift, Tuffy console, Four X Dr. rocker guards, Rock Hard sport cage, Kilby OBA with 1.75 gal tank and York 10.3cc compressor, Tube fenders by GenRight Offroad, Fabricated rear bumper and tire carrier.
Last edited by Jeep Daddy; 05-13-2003 at 11:18 PM..