Simply Amazing
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Joined: Sep 2004
Posts: 91
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From: Germantown TN
Simply Amazing
Those are the only words I can think of to describe what the GM Posi additive/fluid did for my diff/rear end. I followed your directions: drained the old completely, then put in the additive and new gear oil. After some figure-8s to work it in - no more grinding noise - all is well, peace & love in the valley! I could not find the thread to thank everyone properly who gave me advice. I could have spent a bundle at the shop without your help....and still had the same problem after getting everything 'fixed'. THANX AGAIN!!!
