axle u-joint -
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post #1 of 2 Old 06-09-2013, 12:15 PM Thread Starter
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1994 ZJ 
Join Date: May 2013
Location: Clearfield
Posts: 60
axle u-joint

Ok the latest project on my "new" zj is to solve the squeaking problem. I hear a squeaking/chirping from the drivers side front wheel. This sound is not audible above 40mph, isn't tied to rpm but increases with vehicle speed. It also goes away when I apply the brakes. The u-joint looks dry and rusty and as an experiment I hit it carefully with some wd40. The squeaking went away for about 10 min of driving.

Also I noticed it king of binds a bit on a really tight turn. But only on really tight turns. I swapped a 242 in a week ago, so I am just noticing the binding as seperate from the 249 problems I was also having.

The brakes are rusty looking but have 1/4 inch left on the pads.

My questions are : #1 can these u-joints be greased or is the u-joint just failing and in need of replacing?

#2. Is it even the u-joint if the sound stops when braking? Or would that be more of it just changes the stress when decelerating?

#3 if I have to replace the u-joint should I to ahead and replace the hub as a pre-emptive strike against wheel bearings going out eventually?

The ZJ in question is a 94 limited with the 5.2 engine. I am also quite new to car repairs. I've swapped a 242 in and changed out a oil pressure sending unit. That's the limit of my experiance in repairs so far. How hard is changing out a bad u-joint?

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post #2 of 2 Old 06-09-2013, 12:25 PM
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1995 ZJ 
Join Date: Jul 2012
Location: Phoenix
Posts: 3,480
u joints arent too hard. theyre very easy if you have access to a small shop press. if not you can just use a BFH. theres lots of videos on youtube on how to replace u joints

Reliability is relative
R.I.P. Ratmonkey
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