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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Rear Whining.

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Unread 04-05-2013, 11:19 PM   #1
NewtoZJ
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1998 ZJ 
 
Join Date: May 2012
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Rear Whining.

It happens at around 35-45 MPH, and is continuous whether I am coasting or giving it some throttle. It slows as the vehicle does, and stops below about 20MPH. Am I correct in assuming my rear diff is going out? Bearings? Spider Gears? I would appreciate everyones input. $$$?

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Unread 04-06-2013, 12:06 AM   #2
Roskoe
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Pull the cover off and check it out , When was the Fluid changed last?
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Unread 04-06-2013, 03:22 AM   #3
hdrocknroll
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Ya, Fluid , but don't freak out, it can run a long time singing to ya, but leave you in the chit, so , depending on how U use/drive
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Unread 04-06-2013, 09:13 AM   #4
NewtoZJ
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I'll check the fluid before I leave for work today, and possibly replace it this coming week. And I only drive about ten miles a day to and from work, and to downtown columbus once in awhile. But I plan on doing some long drives this summer, so I'll probably just get it rebuilt before then. I have a credit card at zero balance and I have some months left on the 0% APR, and I have the cash to pay outright for whatever damage has been done. I'd just rather not blow it all at once.
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Unread 04-06-2013, 09:15 AM   #5
riot1987
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Could be carrier bearings that are starting to go. Pull the carrier when you check fluid and look for pitted bearings.
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Unread 04-06-2013, 12:25 PM   #6
ratmonkey
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Carrier or wheel bearings.
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Unread 04-06-2013, 05:17 PM   #7
mholmes7979
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Just been through this adventure. Jack up the rear end and support it completely off the ground (;oosen but, don't remove wheel lug nuts first). You don't need to take anything apart yet. Then take the drive shaft out (fluid will run out of the transmission if you don't have a spare yoke to put in the transmission). With the wheel off the rear end pull the axles back & fourth towards you and turn the drums around. If I'm close in my guess you will hear a clunking in the axles. Most likely the passenger side more than the drivers side. Also inspect the U-joints to see if they clunk & are free. Lastly move the yoke on the rear end and see if there is a "Big" clunking sound (all have some clunking noise).

Most likely you have a u-joint or a wheel bearing going out. To fix it yourself is not that tough or expensive. Before you jump in remove the rear end cover and just take a look. If junks don't fall out and the fluid is not full of metal you might want to fix it yourself. Go to you tube for video's if you're not familiar with the parts. If you find you have all of the above as problems and your not handy take it to a rear end specialist.
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Unread 04-06-2013, 09:38 PM   #8
riot1987
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Quote:
Originally Posted by mholmes7979 View Post
Just been through this adventure. Jack up the rear end and support it completely off the ground (;oosen but, don't remove wheel lug nuts first). You don't need to take anything apart yet. Then take the drive shaft out (fluid will run out of the transmission if you don't have a spare yoke to put in the transmission). With the wheel off the rear end pull the axles back & fourth towards you and turn the drums around. If I'm close in my guess you will hear a clunking in the axles. Most likely the passenger side more than the drivers side. Also inspect the U-joints to see if they clunk & are free. Lastly move the yoke on the rear end and see if there is a "Big" clunking sound (all have some clunking noise).

Most likely you have a u-joint or a wheel bearing going out. To fix it yourself is not that tough or expensive. Before you jump in remove the rear end cover and just take a look. If junks don't fall out and the fluid is not full of metal you might want to fix it yourself. Go to you tube for video's if you're not familiar with the parts. If you find you have all of the above as problems and your not handy take it to a rear end specialist.

If you pull the driveshaft there are no longer any Ujoints located in the rear half of the vehicle that could be making noise. The rear axle doesnt have any Ujoints.
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Unread 04-06-2013, 09:54 PM   #9
ZJfamilyfun
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i just turn around and tell the kids to stop!!!....lol
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Unread 04-06-2013, 09:58 PM   #10
riot1987
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Originally Posted by ZJfamilyfun View Post
i just turn around and tell the kids to stop!!!....lol
funny. dumb. but funny. FYI your transmission is a 44re. You can finish filling out your jeep info
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