Re: identification
Those are two completely different rears. The GM corporate 10 bolt has a cover that is more or less round. The Dana 44 cover is sort of hexagonal.
Now I have never looked at a GMC 61 4WD closely enough to see the rear. The Chevrolet 1/2 ton rear for that year has a removable center section (comes out from the front) as well as a round cover. Chevrolet 1/2 ton trucks changed to a rear with a 12 bolt cover (not the same as the car 12 bolt) in 63. What most people think of as a 10 bolt wasn't used on trucks until sometime in the 1980s.
If you need more help identifying what you have, please post a pic.
Ray
Last edited by raycow; May 14th, 2013 at 02:52 AM.
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