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post #1 of (permalink) Old 10-06-2007, 11:22 AM
JackNanticoke
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Death Wobble after lift. HELP!

I recently got my 2006 Rubicon lifted with a RE 3.5 standard lift. I got the RE monotube shocks and adjustable front and rear trac bars. I also got it aligned.

Here is the issue. With the stock tires, everything is fine. I can drive and hit bumps and I experience no wobbles.

However, when I throw on my Mickey Thompson wheels with 33' BFG AT (which i had balanced), I get death wobble when I hit a pothole or go over a bumpy part of the highway. This occurs at speeds above 30mph.

If I take the 33's off and put the stock ones back on, I am back in business. I do still have the stock steering stabilizer that came with the Jeep.

Any Ideas or should I just upgrade the steering stabilizer? I have read that it could be other things like caster is off, but it everything is fine with stock tires.

Any help is appreciated.
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post #2 of (permalink) Old 10-06-2007, 12:20 PM
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Welcome to the board!

Death wobble is usually caused by several problems. Insufficient caster is a prime suspect, especially after a lift. Your alignment sheet should show what the caster is. With a lift and large tires you often need a bit more caster than stock. So the first question is, what is your caster?

Other factors are worn ball joints, loose wheel bearings, and any looseness in the suspension links and and looseness anywhere in the steering system. To find the latter, with the engine off have a buddy rock the steering wheel back and forth just to the point where the wheels begin to steer. Then examine every connection in the linkage, and slso look for the steering box of axle to be moving side to side.

The steering stabilizer is a shock absorber in the linkage. It's job is to prevent an action at the tire, like hitting a big rock, from being transmitted back to the steering wheel. It's not designed to prevent death wobble, although it will reduce it, but if the underlying cause is still there, you'll get premature tire wear and possibly premature wear to suspension and steering components.

Death wobble is a common problem that's been discussed ofter. If you do a search for "death wobble" you'll get a bunch of hits, some quite recent. Look them over for more information and other opinions.

EVERYTHING's easy for the guy who doesn't have to do it.
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post #3 of (permalink) Old 10-06-2007, 02:54 PM
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we have a active post on death wobble, but take the jeep to a reliable shop and get an alighnment, Most of what we found in the other post is that the wheels are not ballenced correctly. Make sure you tell the shop to put weights on both sides of the rims if needed. and make sure they are able to ballence larger wheels.
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