ZJ hits bump then gets shimmy - JeepForum.com

 
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post #1 of 7 Old 03-12-2002, 12:32 AM Thread Starter
EricsXJ
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ZJ hits bump then gets shimmy

Commin over from the Cherokee Forum... my Dad's got a 96 ZJ and says when he's going about 50 - 55 mph, and hits a bump, he then feels a shimmy or vibration in the steering wheel. Any thoughts on what could cause this? He says it only started doing this in the past few weeks. FYI, he has no lift, tires are 3 years old and its been quite some time since he's had an alignment.

Thanks,


Eric
2000 XJ "PROJECT RUBICON" 3-link front / 4-link rear / coilovers / running 37's on Dana 60s
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post #2 of 7 Old 03-12-2002, 08:14 AM
fitzer
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Quote:
Originally posted by EricsXJ:
Commin over from the Cherokee Forum... my Dad's got a 96 ZJ and says when he's going about 50 - 55 mph, and hits a bump, he then feels a shimmy or vibration in the steering wheel. Any thoughts on what could cause this? He says it only started doing this in the past few weeks. FYI, he has no lift, tires are 3 years old and its been quite some time since he's had an alignment.

Thanks,
EricsXJ,

Balance and rotate tires then alignment.

If he still gets the vibration after that, post again and I can give some resources for what to check/do next.

Peace...

93 ZJ 4.0, Rancho 9000's, Rancho Stabilizer, Splitfire plugs, BFG A/T 235/75/15's
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post #3 of 7 Old 03-12-2002, 08:43 AM
motox77x
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ericsxj

have you looked at the front track bar. this is a very common failure and could cause the axel to float around a little after a freeway speed bump...???

96 Grand Cherokee/ 4.0L/ RE 4.5" lift/ SYE/ Woods drivelines/ 31's/ many other homemade goodies
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post #4 of 7 Old 03-12-2002, 12:50 PM
g95jgc
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Back in the day when my ZJ was stock, I had the same problem. Really irritating. I replaced the steering damper and never had another problem with it.
John
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post #5 of 7 Old 03-12-2002, 05:24 PM Thread Starter
EricsXJ
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Thanks for the ideas so far guys!

Mottox77x, ya I "looked" at the track bar. In fact thats the first thing I did when he told me of the problem LOL! But.. his track bar is the same as my old stock track bar. Question is, how do the fail? At the ball joint?

Hadn't thought about the steering damper. Hmm... Thanks

Eric
2000 XJ "PROJECT RUBICON" 3-link front / 4-link rear / coilovers / running 37's on Dana 60s
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post #6 of 7 Old 03-15-2002, 06:54 AM
fitzer
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Track bars usually fail at the joint - unless you really deform one offroad.

Lateral (horizontal) movement of the trackbar is a no-no.

If the steering stabilizer is truly shot then that could be the culprit. Is there any visible oil leakage? If not, the best way I have heard to test the stabilizer is to remove one end - the easier of the two (can't recall which at the moment)and manually acuate the stabilizer. If you feel any spots in which there is little or no resistance - a dead area - it's bad.

However, if the stabilizer is not bad and you replace it you are just masking a problem that will eventually occur again even with a newer stabilizer.

fitzer

93 ZJ 4.0, Rancho 9000's, Rancho Stabilizer, Splitfire plugs, BFG A/T 235/75/15's
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post #7 of 7 Old 03-15-2002, 05:17 PM
GrandCherokeeLifer
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John and Fitzer are right. I had the same problem and the dealer replaced my steering stablizer/dampener and it fixed the problem.

Alex
96 Grand Cherokee Limited
5.2 V8 no mods.
04 VW Touareg
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