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Drivetrain - 2001 - 2010 Discuss front and rear axle, transfer case, brakes, etc. Transmission questions belong in the appropriate transmission forum below. First through fourth generation...


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Unread 09-04-2019, 07:13 AM   #1 (permalink)
db131994
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Problem with rear diff (I think)...

I've been searching on this, and read a lot about the slip yoke. Not sure that's my issue, but I'll give that remedy a shot soon.


Here is my issue: When I put the truck into reverse and back up, it will roll about a foot or so, then its like theres a tooth missing in the the rear diff. It studders (or clunks), then goes on. I've only noticed this when backing up a slight grade, and after the truck has warmed up. Have not noticed anything from a stop in forward gears, like most with the slip yoke issue.


This is on a 2002 2500HD with Allison and 287,000+ on the clock. Alli was just rebuilt about 10,000 miles ago. Have noticed this issue for the past 4-5 years, but seems to be getting worse. Plus, we are towing a heavy toy hauler now, so I'm a little more concerned...


Appreciate any input.

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Last edited by OkDually; 09-04-2019 at 08:58 AM. Reason: prefix
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Unread 09-04-2019, 07:16 AM   #2 (permalink)
db131994
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Oh, and I replaced the U-Joints in the past year too. No change.

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Unread 09-04-2019, 12:19 PM   #3 (permalink)
Ron Nielson
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I would look at the clearances in your differential. Sounds like a lot of wear there. Some adjustments are possible, but may entail more than just adjustment.
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Unread 09-04-2019, 03:24 PM   #4 (permalink)
davester
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Chock the wheels, lift one of the rear wheels up, pop the diff cover off, stick it in neutral and see how the diff gears look while spinning the wheels in each direction.
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