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Discussion Starter · #1 ·
Hello everyone,

I have a 2006 Jeep Wrangler Sport that just got a 2.5 inch Rough Country lift installed (just shocks and springs). After the upgrade at 45-50 mph I get the death wobble until I slow down and the vibrations subside. It seems odd to me that a lift kit would work well without components such as extended sway bar links, track bar and pitman. Has anyone had good luck using a kit like this with stock components or do i need to upgrade to preserve the geometry?
On the other hand If the stock parts work with the lift where in the steering/suspension should I direct my attention? Also I should mention on acceleration I feel a vibration from the back and something in the front.
 

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I also had DW after installing this lift, I finally got it to stop after doing the following.....re-balancing the tires, getting another alignment (first shop didn't get the alignment right) and replacing the worn steering stabilizer. I also had a little bit of driveline vibrations, which were fixed by adding a couple washers on the transfer case skid. This lift rides really rough, and i cant wait to get rid of the shocks that came with it.
 

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Did you bother to get an alignment done afterwards?

One reason why I don't like these "budget" lift kits.........most if not all in reality are "incomplete" especially if you are looking for the factory ride to remain intact.

The vibrations you feel as stated could be because of the rear DS being too far out of alignment......you could also have other components worn too, and combined with the lift kit the problem is now magnified.

Jon there are all kinds of things you can buy to help improve the ride quality and get it back to stock feel, but it all depends on how much money you're willing to throw at it.
 

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tires being out of balance should have been noticed before the lift, a steering stabilizer will only mask the real issue if it did anything at all, if a shop doesnt know how to complete an alignment, how can you trust them to install your lift with any competency

these are some reason i do all of the work on my rig myself. plus you become much more familiar with your jeep and tend to notice things before they get too worn and start damaging other components
 

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I installed the same kit on my '05 TJ..

Did it myself, didn't do the wheel alignment, didn't drip the TC .... And no problems what so ever...
 

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I installed the same kit on my '05 TJ..

Did it myself, didn't do the wheel alignment, didn't drip the TC .... And no problems what so ever...
Yeah, Id be doing a wheel alignment pronto........lifting up 2.5" means your toe is going to be out of spec.
 

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Yeah, Id be doing a wheel alignment pronto........lifting up 2.5" means your toe is going to be out of spec.
X2....I would estimate that you're toe'd in at least 1/2-3/4" if you haven't readjusted after lifting 2.5". That would definitely initiate dw. Also check for worn track bar ends/mounts.
 

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You should probably get everything balanced and aligned and make sure everything is on very tight. You should probably look into replacing all the stock components cause they could cause trouble for you down the road. Especially if you off road. The slightest bend in a tie rod or something can cause death wobble. Mine was like that and I bent the tie rod and wound up having to replace the tie rod, track bar, upper and lower control arms, and my stabilizer. And recently I got DW and had it looked at and it was just because I had knocked a joint loose and it just needed to be tightened. Also if your tires have worn weird or are cupped that can also cause you to have DW.
 

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Discussion Starter · #10 ·
I did get it aligned and replaced the bushing on the stock track arm. This is def. Death wobble not a tire balance issue. On a side note with the lift, should i do drive shaft u joints because of the new angle?
 

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how would adding springs and shocks cause death wobble?

only thing i can think of is that the installer put too much stress on CA bushings or something similar. just adding new springs and shocks should not cause dw.

what is your toe in set to?
 

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I did get it aligned and replaced the bushing on the stock track arm. This is def. Death wobble not a tire balance issue. On a side note with the lift, should i do drive shaft u joints because of the new angle?
Can you define death wobble please?
 

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Discussion Starter · #13 ·
Death Wobble- When the front end begins shaking violently after hitting a bump or encountering some other disturbance around 50 mph. The only way to stop it is to slow down significantly until the harmonics of the vibration are back and in sync then I can accelerate back to 45 or so.. When seen from a following vehicle: the front tires look as though they are shaking rapidly and ready to rip off the jeep
 

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I have the same lift as you with the n2.0 shocks. I noticed the ride was stiffer than the stock and I also had death wobble issues. Solving the death wobble was actually very easy, the death wobble is caused from a negative caster that was created by the lift. I installed a set of cam bolts on the lower control arms on the axle side, and maxed them out. Then i checked out and adjusred my toe in and straightend out my steering wheel following one of the instructions on stus offroad site. I have not experianced any dw since. As for the stiff ride i noticed that the front axel pushed over to the drivers side of my jeep, and that the track bar was to short. In the rear I installed a track bar bracket, that fixed the issue, for the front I went with an adjustable track bar. When I unbolted the stock track bar I noticed right away the front of my jeep rise up about 1". After installing the new adjustable track bar centering up the axel checking alignment and a test drive all the sharp impact of the front suspension is gone, and the ride is much better now than stock. I believe it is because the short track bar was preloading the front suspension.
Hope this helps.
 

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Just to add here.. I have no issues re DW, very easily doing 80mph with no problems, even when I let the steering go, the Jeep is running straight as an arrow, uneven surface and all

I done the lift and now tires at the same time, and initially I did had a bit of a shake, but that was down to over inflated tires.. Took the tires down to 28psi, and no more shaking!!

But yes, need to get the wheels alignment checked out, just to ensure all is as it should be down there..
 

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I've done the measurement, as described in the topic, that is why I decided not to rush to the wheel alignment centre !!
 
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