Rear end grinding 98 laredo 5.2 - JeepForum.com
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Unread 06-09-2013, 10:46 AM   #1
shaynesaw
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Join Date: Mar 2013
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Rear end grinding 98 laredo 5.2

When i turn either way i get a bad grinding noise which appears to be coming from the back half of the vehicle. I figured it was the rear bearings or diff. So I changed the back wheel bearings and inspected the diff condition. Diff looks mint.
Grinding continues. Doesn't happen until the vehicle is warm. Any thoughts?
Any thoughts?

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Unread 06-09-2013, 12:22 PM   #2
shaynesaw
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Part store guy suggested synthetic gear oil and posi-track antislip additive.
Will try that
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Unread 06-09-2013, 12:40 PM   #3
PolkaPower
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1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss, MD
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Do you have a limited slip in the rear? If you don't then don't bother. The friction additive is for the clutches on the limited slip so if you don't have one it's useless. Gear oil isn't going to stop the grinding.
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Unread 06-09-2013, 12:56 PM   #4
shaynesaw
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I have a dana 44. How do I tell?
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Unread 06-09-2013, 12:59 PM   #5
shaynesaw
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I put 80 90 gear oil in when i did the bearings and it seemed a bit worse.
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Unread 06-09-2013, 02:51 PM   #6
PolkaPower
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1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss, MD
Posts: 16,037
It would have a metal tag on the diff that will say limited slip and another tag with the axle identification on it. Like 44a. Or you can request your build sheet from Chrysler via email. The oil weight will not cause a grinding noise. It's probably a carrier bearing or pinion bearing maybe. That is if you are sure that it's coming from the rear.


Why do you have two threads on the same topic?
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