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Discussion Starter · #1 ·
As long as I am here...
When I stop the truck I feel and hear a distinct THUMP from the rear end???

It actually makes me think the spare tire is loose in the bed and slides up and hits the back of the cab...

I have a 2500HD 4x4 6.7 liter Anti spin rear differntial...
 

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What you are hearing and feeling is probably the Torque Converter unlocking. It's annoying but you get used to it. OR after reading the TSB, it could be the 4-1 downshift..haha
 

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As long as I am here...
When I stop the truck I feel and hear a distinct THUMP from the rear end???

It actually makes me think the spare tire is loose in the bed and slides up and hits the back of the cab...

I have a 2500HD 4x4 6.7 liter Anti spin rear differntial...
Did you get this problem fixed? Just curious because I may have the same problem and wanted to know if you did anything to get rid of it... Thanks.
 

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I had a similar sound a while back and it ended up being the rear fender well lining had lost some bolts, simple fix hard to track down.
 
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