Vibrations after TC drop? - JeepForum.com

 
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post #1 of 7 Old 04-26-2010, 08:57 PM Thread Starter
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.


97 XJ 2 door sport- 3" Rusty's lift, 31" MTR's
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post #2 of 7 Old 04-26-2010, 09:03 PM
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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post #3 of 7 Old 04-26-2010, 09:03 PM
MoparFreak69
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1990 YJ Wrangler 
 
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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!

90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
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post #4 of 7 Old 04-26-2010, 09:06 PM
moonshinefuel
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Beat ya to it moparfreak.
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post #5 of 7 Old 04-26-2010, 09:10 PM
88blkyj
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hey U joints!

oh sorry...
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post #6 of 7 Old 04-27-2010, 02:30 PM Thread Starter
97Xj_Sport
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Thanks guys, don't know why I didn't think of that.

97 XJ 2 door sport- 3" Rusty's lift, 31" MTR's
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post #7 of 7 Old 04-27-2010, 03:31 PM
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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