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XJ vibes a lot past 55MPH

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Old 02-24-2012, 11:39 PM
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Default XJ vibes a lot past 55MPH
I have a stock XJ with 235's, seems to vibe a lot after passing 55mph, just wondering if this is normal. It vibes so much it turns into "hollow box" noise going into the 70-80 range.
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Old 02-24-2012, 11:52 PM
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Get your tires balanced.
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Old 02-25-2012, 10:59 AM
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I do that every 3500-5000, always the same, maybe a tiny bit better for 500 miles.
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Old 02-25-2012, 11:49 AM
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might be time for u joints
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Old 02-26-2012, 05:22 AM
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Possibly, I was told they were fine, along with the drive shafts, not to long ago..
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Old 02-26-2012, 08:18 AM
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If the tires are balanced, I'd also point towards U-joints.
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Old 02-26-2012, 09:15 AM
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Told by whom? I've watched so many customers of mine run around in circles and debunk what I'm telling them for months because "That was just done", only to eventually find out that "That was just done... wrong and needs redone"
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Old 02-26-2012, 12:07 PM
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Is it stock or lifted?
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Old 02-26-2012, 12:13 PM
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bad trans mount or u joints could even be bad wheel bearing
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Old 02-26-2012, 12:46 PM
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If it's lifted could be drive shaft angle and need TC drop and or rear shims as well.
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Old 02-27-2012, 12:46 PM
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Originally Posted by Donnie_K
Told by whom? I've watched so many customers of mine run around in circles and debunk what I'm telling them for months because "That was just done", only to eventually find out that "That was just done... wrong and needs redone"

Told by brakes plus, tires plus, and a local shop "G&T Automotive", plus I did a little checking myself. Nothing is loose..
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Old 02-27-2012, 12:48 PM
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Originally Posted by Bimmer9938
If it's lifted could be drive shaft angle and need TC drop and or rear shims as well.

Its stock, just as I said in the inrto of this post.
Last edited by Erik Hoeffner; 02-27-2012 at 12:54 PM.
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Old 02-27-2012, 12:50 PM
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Maybe I should also mention; Does anyone else have this "lurch" feel if you let off the gas abruptly going 55-65, with a sort of clunk to it?
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Old 02-27-2012, 12:54 PM
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This is a tech issue, so you'll probably see it get moved over there. To answer your question though, everything you're describing would be caused be your rear drive shaft u-joints being bad.
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Old 02-27-2012, 01:23 PM
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Moved to OEM Tech.
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