what could be the cause of a uncontrolable wobble after hitting a pretty sharp dip in the road while slightly turning?? Happened today and freaked me out a bit. I got the truck stopped and checked underneath but could see any thing broken or out of place. After that it seems to be driving fine.

 

Which 3" lift do you have?

 

Number one cause is usually a track bar that is loose. Did you make sure to tighten yours to 125 ft. lbs. with the entire weight of the Jeep on the ground? Also, like Rubimon said, what type of lift and what all components do you have?

 

Death wobble on 4 link coil suspensions is most often caused by tires out of balance. I know this for a fact cuz my WJ did it we spent a lot of time and money working the suspension until I watch it happen from outside the vehicle. We got the tires balanced and no more wobble, even over the worst Colorado roads.........

 

what is your toe in and caster angle ?

If you don't know this then you might wish to bring it in for an alignment or check yourself.

 

Ummm, I think you are confusing a rough ride or steering wheel shimmy due to tires that aren't balanced with a very serious, violent, out of control shaking of the entire vehicle to the point where you think you're going to crash due to a problem in your suspension and/or steering setup.

 

Due to the steering setup on the JK, toe-in should not have been effected due to a lift... but, all things being equal, I have seen it be a source of DW. A lack of caster would most likey cause wandering but I hardly doubt it would be enough to cause DW. I think I would still check the track bar and make sure it is on to the appropriate torque setting. Also, if the control arms were removed and/or replaced during the install, I would check those bolts too.

 

yup, but I was thinking "new" as in tight and not worn bushings. Loose track bar would be #1 culprit.
his does sound like maybe over corrected bump-steer. What lift you running?

 

I've posted elsewhere about the full deal - but my death wobble was the precursor to my track bar bracket shearing off the front axle. I would strongly recommend checking all the welds on it.

 

You can get DW from "out of round" tires, but it usually happens in combination from bad alignment or bad control arm angles.