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Unread 04-26-2010, 08:57 PM   #1
97Xj_Sport
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Vibrations after TC drop?

Helped a buddy lift his yj (rusty's 4") put the six degree shims in and it drove fine, with just a little vibration. We put on the TC drop a week later to get rid of all the minor vibes an after we finished we drove about 15 miles to a best buy and it drove fantastic, no more vibes, no wobble. On the way back to his house it started to vibrate more than before the TC drop when he would accelerate when going 60 and above, made sure everything was tight but still has the same problem. Any guesses? Thanks.

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Unread 04-26-2010, 09:03 PM   #2
moonshinefuel
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U-joints, they develope wear patterns in the needle bearings when driven so long at a certain angle. Replace with new Spicer U-joints. (My guess)
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Unread 04-26-2010, 09:03 PM   #3
MoparFreak69
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U joints wore into the pattern of how the joint flexed at the stock height. Lifting it moved the pivot spots and the joints are moving from a worn spot to a non worn spot. Try replacing the u joints and the problem should disappear.

EDIT: Moonshine beat me to it!
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Unread 04-26-2010, 09:06 PM   #4
moonshinefuel
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Beat ya to it moparfreak.
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Unread 04-26-2010, 09:10 PM   #5
88blkyj
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hey U joints!

oh sorry...
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Unread 04-27-2010, 02:30 PM   #6
97Xj_Sport
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Thanks guys, don't know why I didn't think of that.
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Unread 04-27-2010, 03:31 PM   #7
clush
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Good Info, I am putting a 4" lift on and I will prolly just go ahead and replace the u joints while I have all the tools out. Didn't think of that one either, but it makes sense.
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