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Old 03-05-2013, 12:44 AM   #1
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U joints

what are the common signs of a bad U-joint or one that is going bad???

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Old 03-05-2013, 01:49 AM   #2
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grab it and try to shake it and sometimes you can hear them clicking as they rotate

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Old 03-05-2013, 04:16 AM   #3
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While driving you can hear some clunking/clicking - Like Tylerf83 said... MOst noticable under load.

As for checking on them while parked -

Climb under there and give it a good push and pull in both directions, parallel to the "+" of the U-joint. If your driveshaft moves more than a wiggle, they're going bad. If you get your face right next to the U-joint while you're doing what I said before, you'll also be able to see the "+" moving around in the caps - if they're bad, that is.

You can also always pull your shafts, remove your U-joints and physically check the rollers by removing the caps - but that takes a lot more time.
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Old 03-05-2013, 11:10 AM   #4
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Vibration or rumbling sound especially at decel.
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Old 03-07-2013, 01:11 PM   #5
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I noticed that mine were going bad just after I lifted my jeep. I replaced the axle u-joints and felt a difference. While driving in 2nd and 3rd I felt a bad vibration from the rear, so i replaced all the drive shaft u joints as well. As soon as I drove it with the new u joints it was a much smoother ride.
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