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Bad Vibes at 25mph+

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Old 10-18-2010, 06:10 PM
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Year: 1999
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Engine: 4.0L HO 242
Default Bad Vibes at 25mph+

So I drive my jeep everyday with 4.5 in lift tc drop and saving for sye. I am currently experiencing vibes coming from under my driver floorboard at 25mph and up. They only go away when I slow down below 25. I also just replaced the driver front wheel bearing. This seemed to improve slightly but still not enough. I have tried adjusting the control arms and am getting it realigned tomorrow. Anything else I should have them check?

If you have any other questions about my set up or thoughts please help. 6 pack to the first person who comes with a solution that works lol!

JB
Old 10-18-2010, 06:56 PM
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Check the trac bar. One end is bolted to the frame on the drivers side, the other is bolted to the axle housing. The end by the frame has a ball and socket type joint similar to a tie rod end. The end on the axle housing has a bushing with a bolt going through it. If either end is worn, it can cause quite a shake. If your rig is lifted 4.5", you should probably have a longer trac bar installed. There are adjustable trac bars on the market for that application.
Old 10-18-2010, 07:05 PM
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Have a brand new adj track bar installed. So I don't think that is it as it doesn't look fairly worn yet. Just installed it about 4 months ago. I will double check it tomorrow though.

Thank you
Old 10-18-2010, 07:09 PM
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your prly gonna need a sye, due to the bind and wear and stuff your u joints also mite need attention, if you got a np242 tcase i would get the ironrock hack and tap, i got it with a jy cherokee front drive shaft fixed my probs and havnt had any troubles, and im on 33's and 7inchs of lift
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