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Unread 09-01-2013, 05:08 PM   #1
Cmense
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1998 XJ Cherokee 
 
Join Date: Jul 2011
Location: erie, pa
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loud whining from rear end d44

98 Xj 145k 6.5" with SYE d44 4.88 gears with limited slip. I have had this problem since I've bought it 8months ago. PO stated he's tried fixing it with outer bearings when he realized it was from the inside. Possible pinion bearing. He bought the Xj modified too so it could be just years of abuse that has caused this. From 10mph till about 40 45mph a loud almost deafening whine come from the rear end and it continues around 20mph as i slow down. Any type of coasting down hill it quiets up but with even a tap to the gas petal itll whine. Hopefully someone can tell me "yeah that's exactly what it is!" Because I don't really have the money to replace a whole lot. I guess the first step would be pull the cover clean and refill. Just hope I'm not looking at replacing a rear end now. Those gears are not cheap!

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Unread 09-01-2013, 05:21 PM   #2
222Doc
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2012 JK Wrangler 
 
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why refill? new oil wont fix this. if this is as bad as you have said, driving it will make it worse. check the pinion first and the rear drive line,(just in case).

is the rear tipped up A lot.? if it is that will starve the pinion bearing of oil. if you fix it, next time over fill it to bring the level up.
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Unread 09-01-2013, 05:46 PM   #3
kornfanxx61
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From what I know it might be a good call to shake your rear drive shaft at the yolk, if you have play in it you have a bad pinion bearing, which can cause whining, also check your pinion seal, take some degreaser and brake clean and see if you have any leaks after you clean off the diff
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Unread 09-01-2013, 05:46 PM   #4
Cmense
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It was just a thought... I gotta get in there to inspect the gears anyways.. There is a slight incline on the axle but no signs of shims.
img_20130901_194240.jpg

img_20130901_194336.jpg

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Unread 09-01-2013, 05:51 PM   #5
kornfanxx61
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New fluid might not be a bad call if you are trying to postpone rebuilding your rear end, check quadratec for a high fill point axle cover too, helps get axle fluid back there as well
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Unread 09-01-2013, 05:51 PM   #6
Cmense
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Quote:
Originally Posted by kornfanxx61 View Post
From what I know it might be a good call to shake your rear drive shaft at the yolk, if you have play in it you have a bad pinion bearing, which can cause whining, also check your pinion seal, take some degreaser and brake clean and see if you have any leaks after you clean off the diff
Do I have to drop the driveshaft for that? I just checked with it bolted up and that sucker isn't moving
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Unread 09-02-2013, 10:08 AM   #7
kornfanxx61
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Nah you don't but if its solid then there's an internal problem, run some royal purple 75-140 in there and see if it helps with the whining, sometimes the whining happens because there's water damage to the axle from off Roading, Dana and mopar both say that if water gets 2 inches above the center of your rim to do a fluid change in your diffs, those seals don't stop standing water. But it's probably still gonna whine until you rebuild your rear end.
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Unread 09-16-2013, 09:08 PM   #8
Cmense
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So I pulled the cover today and inspected everything. Carrier bearings are shot. Pulled a lot of metal out also. Any know a good website to order carrier bearings and shims?
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