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  #1  
Old March 11th, 2018, 17:27
Donski Donski is offline
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Death wobble nightmare-I need some advice

Hi,
I've been trying to deal with death wobble in a stock 98 XJ for about a year.
I replaced all of the front end components and had it aligned, and it would still start wobbling at about 65mph after hitting a bump. I was pulling my hair out until one day I felt the back end shake, before the front end started wobbling.
So I looked at the rear bushings and they were all garbage. Now I'm really pissed because I replaced them about 3-4 years ago with new Dorman rubber bushings.
So, I took the rear apart and installed new poly bushings with new springs and shackles from Crown. I also replaced the front upper and lower control arm bushings with poly as well. I've been driving it and it feels great. The only thing it would do is shimmy a little bit when it hit a bump, but it would always settle down. Until today, I hit a bump on the fwy at 68mph and the wobble starts again. If I keep it below 63, it seems to be fine. The steering always feels a little heavy like it wants to wander when the tires catch a grove in the pavement.

I'm wondering if changing the caster would help at all. Right now, it's at 6.4*. If I increase it to 7 or 7.5 would that help?

Thanks
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  #2  
Old March 11th, 2018, 17:37
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Jeff-97XJ Jeff-97XJ is offline
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Re: Death wobble nightmare-I need some advice

Just a thought, did you change the Steering stabilizer shock absorber?
It is one of the things I changed when I had the DW.
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  #3  
Old March 11th, 2018, 17:50
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jeep ride jeep ride is offline
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Re: Death wobble nightmare-I need some advice

Have you had the tires balanced and rotated?
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  #4  
Old March 11th, 2018, 18:01
Donski Donski is offline
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Re: Death wobble nightmare-I need some advice

Hi,

The steering stabilizer was the first thing I replaced, before the track bar, tie rod ends and hubs.

I just had the tires rotated and balanced as well. The tires are old though, almost down to the wear bars
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Old March 12th, 2018, 07:27
mfascuba mfascuba is offline
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Re: Death wobble nightmare-I need some advice

Check your hub unit bearings, axle U-joints and ball joints too.
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  #6  
Old March 12th, 2018, 11:52
RCP Phx RCP Phx is online now
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Re: Death wobble nightmare-I need some advice

What lift height?
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  #7  
Old March 12th, 2018, 15:06
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Re: Death wobble nightmare-I need some advice

Quote:
Originally Posted by RCP Phx View Post
What lift height?
None its stock
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  #8  
Old March 12th, 2018, 21:34
Donski Donski is offline
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Re: Death wobble nightmare-I need some advice

I took the Jeep to get the smog inspection done. I was watching one of the back wheels on the dyno, and you could tell by looking at it that it was out of balance. I'm hoping that some new tires will help.
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  #9  
Old March 12th, 2018, 21:47
JeepNoob JeepNoob is offline
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Re: Death wobble nightmare-I need some advice

Quote:
Originally Posted by Donski View Post
I took the Jeep to get the smog inspection done. I was watching one of the back wheels on the dyno, and you could tell by looking at it that it was out of balance. I'm hoping that some new tires will help.
And what was the opinion of the guy running the dyno? Did you get a second opinion from him? Chances are if he's running the thing, he's probably seen that sort of thing a time or two before. Hate to go on a tear here, but if your wheels and tires are out of balance, why not just have them re-balanced instead of installing new tires AND balancing them?
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Old March 13th, 2018, 08:38
Donski Donski is offline
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Re: Death wobble nightmare-I need some advice

The guy running the dyno was busy trying to get my car to pass smog.

I compared it with the wheel and tire on the other side and it was visibly different.

As I mentioned in one of the initial posts, the tires are almost down to the wear bars, and need to be replaced.

Firestone wouldn't re-balance the tires because they were down to the wear bars (although I disagreed)
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  #11  
Old March 13th, 2018, 12:34
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Re: Death wobble nightmare-I need some advice

I had an issue with a right rear tire/ wheel wooble turned out to be a bent axle shaft .
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  #12  
Old March 14th, 2018, 10:52
Donski Donski is offline
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Re: Death wobble nightmare-I need some advice

It's interesting you mention the bent axle because the wheel was actually wobbling side to side like it's out of true instead of hopping because its out of balance.
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  #13  
Old March 14th, 2018, 12:19
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Re: Death wobble nightmare-I need some advice

I didnt realize I even had problem untill we were on trip with some freinds and they noticed my wheel was woobleing got back home found out the axle was bent.
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  #14  
Old March 14th, 2018, 13:24
Donski Donski is offline
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Re: Death wobble nightmare-I need some advice

Thanks for everybody's help. Vehicle just sold.

My parting words to the forum, Don't forget to look at your rear suspension if you've got death wobble
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