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yjderek 03-05-2013 12:44 AM

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

tylerf83 03-05-2013 01:49 AM

grab it and try to shake it and sometimes you can hear them clicking as they rotate

Keymo 03-05-2013 04:16 AM

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. :p

Garyk 03-05-2013 11:10 AM

Vibration or rumbling sound especially at decel.

rmeier 03-07-2013 01:11 PM

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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