Have an 07 4 door X and put a RC2.5" spacer lift on it a few months back, everything seemed fine until about a week ago, when I get up to about 55 or 60 the whole front end starts to violently bounce around to where I have to step on the brakes and slow down for it to stop. I took it and got my tires rotated and balanced and got a front end alignment yesterday, well that didnt help it did it again today......dont know what else to do....cant go over 50 mph!!
Thanks!

 

Sounds like death wobble. Something in the front suspension isn't torqued right. My first look would be the track bar. You need to torque the track bar with the weight of the jeep on it. A lot of guys just do it while it is still on the lift and that won't work. Loosen it up. Bounce on the bumper and then torque it to spec.

 

x2 on that.

 

It was done while it was in the air......anyone know what its supposed to be torqued to?

 

125 Ft. lbs.

 

Thanks!! I'll try that

 

I still say DW. I have experienced it at those speeds. I never found speed had anything to do with it. Course it was much worse and scarrier at 75 in rush hour traffic than at 40 in town.

Make sure you loosen the bolt/nut and jump on the bumper. That will get it sitting right. Then I would snug it up just more than hand tight and bounce it again. Then torque it to 125.

 

Called the local Jeep place here and they said my Caster Angle is probably off, when I got my alignment yesterday the left was at -3.2 and the right was -3.3 the jeep place today said factory is about -4.2 and it should be more then that with the lift. Any of this sound right, its all means nothing to me!!??

 

gotta agree with toad here. DW has become an over-used, generic term, when in fact it really is a very specific symptom.

 

Well maybe it isn't dw but would someone please explain what "real" dw is then. My first experience with it was on my 98 dodge ram. Track bar was going out and I would experience an uncontrollable wobble that usually didn't stop until I slowed to almost a complete stop. It didn't always happen but I experienced it as slow as 35 and as fast as 75. I replaced the track bar and problem was gone. I have lost all the weights off mud tires before and know you can get a shake from that but it never made me feel like my life was in danger. Since he said the tires were just balanced and the alignment checked I figured nothing would be so bad there to cause a serious problem.

To me it seems easier to torque the track bar down right and test than to find someplace to balance my tires again.