TJ: Problem with new lift

[GP4Play]

Had a problem come up today with a new ProComp 2" lift.My Buddy ,Skip,has a 06 TJ with a 4.0,6 sp trans,D30,D44 Rr,31x10.5x15 (Wants to go 33s")tires.Its his DD so no hard off roading just trailes for now. We put the lift and shocks on and tested.Had a vibration at 45-55 mph,so we dropped the pan 1".Vibration gone but now it goes into a death wobble at 45 mph.Can anyone give us an idea what we did wrong?
Thanks
Dennis

[juz_bryan]

Check the bushings on the track bar.

[Materdaddy]

If the track bar is 100%, check the tires.

Are they new tires? Have them re-balanced!!!

[GP4Play]

Check the bushings on the track bar.

Thanks,Added to list,how long do those OEM bushings last? We also rotated tires incase he lost a weight or something.
Dennis

[GP4Play]

If the track bar is 100%, check the tires.

Are they new tires? Have them re-balanced!!!

No these tires are at the end of life but it was fine till we lifted and dropped the pan.We did a little off road trail here for a test and then went to store,thats was when it hit at 45-50 mph.

[randysjeep]

did you have front end aligned after lift? even after a small lift on a tj it has to be, because of the steering system's design.

[GP4Play]

did you have front end aligned after lift? even after a small lift on a tj it has to be, because of the steering system's design.

No alignment,but looks to be next after checking all steering and susp.parts for loose bolts.
Thanks
Dennis

[The-Hurricane]

hmm thats strange, i just did my 2 inch lift on sunday..coil spacer and a rear track bar relocator bracket, shocks and a stabalizer...nothing to crazy and i had none of those problems (so far knock on wood) i didnt even have to drop my belly at all...i planned on getting an alignment done though just to be sure. none of that really helps you...sorry

[aw12345]

If everything checks out mechanically it will either be tire balance or to much caster. Lifted TJ's are a ;ot more prone to bad speed wobble/ shimmy than the stock setup. So what worked stock doesn't necesarily work lifted. It's a very common problem on lifted TJ's and takes a bit of work to fix.
Steering and suspension components first then alignment, then tire balance. Somewhere along there it will go away

[GP4Play]

hmm thats strange, i just did my 2 inch lift on sunday..coil spacer and a rear track bar relocator bracket, shocks and a stabalizer...nothing to crazy and i had none of those problems (so far knock on wood) i didnt even have to drop my belly at all...i planned on getting an alignment done though just to be sure. none of that really helps you...sorry

We First put this on about 9mo.back and he had the vibration prob.From what I've learned 1 out a 5 get it with this low of a lift and he got it(told him it was made on a Fri.)He didn't have any other problem till we put it back on and lowered the pan.

[GP4Play]

If everything checks out mechanically it will either be tire balance or to much caster. Lifted TJ's are a ;ot more prone to bad speed wobble/ shimmy than the stock setup. So what worked stock doesn't necesarily work lifted. It's a very common problem on lifted TJ's and takes a bit of work to fix.
Steering and suspension components first then alignment, then tire balance. Somewhere along there it will go away

I'm trying to talk him into checking out track bar options maybe new bushings,and getting an allingnment.His tires are shot out,thats why the lift ,he wants to go 33"s.Been passing on everyones comments so Thanks for the help.
Dennis

[aw12345]

Well if he needs trackbars I got the front and rear trackbars that came of my jeep after about 3000 miles since new. He is welcome to those 40 bucks for the pair if that is what it needs

[GP4Play]

Well if he needs trackbars I got the front and rear trackbars that came of my jeep after about 3000 miles since new. He is welcome to those 40 bucks for the pair if that is what it needs

Thanks Art I'll let him know.
Dennis