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Old 12-19-2010, 01:12 PM   #1
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I noticed a sqeaking noise today so I had my dad drive slowy down the road while I walked next to it trying to figure out where it's coming from. Is the front driveshaft supposed to be moving while driving in 2wd? I'm pretty sure the noise is coming from the front driveshaft. The noise only happens when the jeep is moving but stops when the jeep is stoped.

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Old 12-19-2010, 01:27 PM   #2
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Yes, front shaft spins anytime vehicle is in motion - note the lack of lock-out hubs on the front end as on older Jeeps with traditional hub/bearing assemblies instead of the unit bearing hubs on the Wranglers.

The squeaking could easily be u-joints or the centering ball in the double-cardan end of the shaft, which is notorious for going dry when not properly maintained. When was the last time you had the shaft off and replaced/lubed the u-joints? The OEM joints are sealed, so you'd have to actually pull them apart to lube. Replacements can be either way; I prefer the greasable Spicer joints, but some folks prefer the Spicer sealed units. Whatever you do, don't put cheap-o u-joints in, it is false economy in every sense of the term.

If I were aiming to diagnose, I'd pull the shaft and re-test. If you still have a squeak, you know it isn't the shaft AND you can re-grease/rebuild the shaft while it is out (it probably needs it anyway, right?). If the noise stops, well, you have your answer and should rebuild the shaft.

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Old 12-19-2010, 02:04 PM   #3
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Checked the ball joints for any play and nothing. What is the center ball in thedouble cardan? And do you grease that?
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Old 12-19-2010, 02:52 PM   #4
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Bump
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Old 01-11-2011, 01:53 AM   #5
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the joint in the front drive shaft where there are two u-joints back to back. make sure you keep this maintained cause if not you will have it lock up and it will blow up your transfer case. It happened to me...P.S. a transfer case letting go doing 75 on the interstate sounds like some shooting a .22 half an inch away from your ear...its not the best feeling in the world.
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