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Old 04-14-2009, 06:59 AM   #1
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New YJ with vibration

I just purchased my first jeep last weekend it is a 1989 YJ with 2.5 shackle lift. The jeep is in great condition it was owned by an old couple who towed it behind their rv it's whole life. The problem I have encountered was at about 52-55mph I am getting a very bad vibration and I can only assume it is from the driveline. Any help would be appreciated.

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Old 04-14-2009, 07:07 AM   #2
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id check u joints.... trans mount ......engine mounts ....4 banger yjs an natorious for breaking the passanger side engine mount its comes with an odd bracket thats just not up for the job .......

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Old 04-14-2009, 09:50 AM   #3
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Thanks I will look those over when I get home.
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Old 04-14-2009, 10:54 AM   #4
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I had a similar vibration and couldnt figure it out and i had the transmission and t-case looked at and ended up have to have the t-case rebuilt
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Old 04-14-2009, 10:54 AM   #5
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rotate the tires and see if it changes. out of balance tire will cause vib as well....

of course, when i got mine, it was all of the above LOL. u joints, broken motor mounts, and out of balance tires
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Old 04-15-2009, 12:59 PM   #6
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Well I checked out pretty much everything from engine mount to tire balance and no luck finding anything. This vibration seems to be high rpm harmonics from something turning much faster than the tires. I am going to take a look at the driveshaft and universal joints when I get home. Are there any more areas that I can take a look at.
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Old 04-17-2009, 08:29 PM   #7
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If you are feeling the vibration in the steering wheel, it may be the dreaded death wobble.

Usually happens around 55mph. If this is true, check all your front steering joints, knuckles & ball joints. Also check that the steering box & pitman arm are tight. If the steering stabilizer looks old, it probably is & replacing it cured my death wobble problems.

That said, do go ahead & check that other stuff first for safety's sake.

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