death wobble - JeepForum.com

 
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post #1 of 15 Old 04-08-2013, 09:02 PM Thread Starter
ZTWITT733J
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My zjs lifted 3.5 inches and i ve had vibrations but nothing too bad. Then I got the bone rattling concussion giving death wobble. So i lifted it up and found a faulty tie rod end, fixed it and ran fine for a month . Now it has returned when i get above 37mph and i cant figure it out at all. Got the tires balanced and a new stabilizer but no fix. Does anyone have a idea or the fix?


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post #2 of 15 Old 04-08-2013, 09:04 PM
WhiteOut
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Track bar and then control arms.

Anything to do with tires or the SS is not going to do anything at all.
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post #3 of 15 Old 04-08-2013, 09:17 PM Thread Starter
ZTWITT733J
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Thats what i thought but thats what my dad said to do

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post #4 of 15 Old 04-09-2013, 07:57 AM
durango-bob
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Ball joints can also be a major contributor.
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post #5 of 15 Old 04-09-2013, 08:38 AM
riot1987
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DW can be a combination of many "little" problems adding up to a bigger picture. As stated check ball joints, CA bushings, etc. You should have an adj. Track bar as well if you dont already. Steering stabilizers sometimes help for some. Most times it isnt that easy of a fix though


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post #6 of 15 Old 04-09-2013, 08:41 AM
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Brian over here had it bad too, he replaced pretty much everything in his suspension. What finally fixed his was a new IRO ADJ track bar.


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post #7 of 15 Old 04-14-2013, 06:22 PM Thread Starter
ZTWITT733J
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I replaced the control arms and checked my adj. IRO track bar (which is tight) and the wobble hasn't left. Any other suggestions? I have a question about the control arm brackets on the axle why are they slotted and what is the correct caster for the front end?

84 CJ-7 Ford 302 Lowered Street Rod
93 ZJ 3.5 lift Trail Machine
94 XJ No doors No windows Woods Beater
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post #8 of 15 Old 04-14-2013, 06:24 PM
WhiteOut
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Was the axle side hole wallowed out? Bushings fine?
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post #9 of 15 Old 04-14-2013, 06:27 PM
riot1987
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Did you check your ball joints? Did you replace the upper ca bushings as well when you did your control arms?


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post #10 of 15 Old 04-14-2013, 06:28 PM Thread Starter
ZTWITT733J
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The bushings were in bad shape but not really wallowed out though

84 CJ-7 Ford 302 Lowered Street Rod
93 ZJ 3.5 lift Trail Machine
94 XJ No doors No windows Woods Beater
02 Liberty 2.4 5 Speed DD
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post #11 of 15 Old 04-14-2013, 06:30 PM
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Quote:
Originally Posted by ZTWITT733J View Post
The bushings were in bad shape but not really wallowed out though
So you removed the bar and checked the axle side mount holes?

Replace the bushings before you try anything else.
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post #12 of 15 Old 04-14-2013, 06:33 PM Thread Starter
ZTWITT733J
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How do you check the bushing i just jack it up and see if i can get any movement on the tire or knuckles and i didnt replace the top ca bushings they are in pretty good shape

84 CJ-7 Ford 302 Lowered Street Rod
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94 XJ No doors No windows Woods Beater
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post #13 of 15 Old 04-14-2013, 08:10 PM
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post #14 of 15 Old 04-14-2013, 08:52 PM
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Quote:
Originally Posted by ZTWITT733J View Post
I replaced the control arms and checked my adj. IRO track bar (which is tight) and the wobble hasn't left. Any other suggestions?
Caster angle. You should be at about 5 degrees positive.

-Eric

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post #15 of 15 Old 07-22-2013, 12:10 PM Thread Starter
ZTWITT733J
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Sorry I'm bringing this back from the dead but the problems still there and the zj isn't my dd during the summer but I'm gonna need it to go over 40 in the future.

I can't find slop in anything. There is some movement in all of the greaseable bushings but that movement is just clockwise or ccw around the links.

Any ideas?

84 CJ-7 Ford 302 Lowered Street Rod
93 ZJ 3.5 lift Trail Machine
94 XJ No doors No windows Woods Beater
02 Liberty 2.4 5 Speed DD
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