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Old Oct 8, 2014 | 06:21 PM
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I have a 1967 Chassis and what I believe to be a posi rear end unit. Can any de-code these numbers I have found? I dont know if it's correct for a 67.
AAW 077 E1 on the bottom of the carrier
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Old Oct 8, 2014 | 06:46 PM
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AW is a 3:08, I believe GM started using the AW designation in 1968
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Old Oct 8, 2014 | 07:01 PM
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My source "Corvette by the Numbers", shows this could be from a 1971-75 Corvette, the code AA = 3.55:1 gear ratio, W = assembled in the Warren plant, 077 = the 77th day of the year of mfg. (need the casting #'s to tell the year of production), E - means it's an Eaton posi unit, 1 - it was built on the first shift. Someone with better sources may have a different answer.

Last edited by Jakes64; Oct 8, 2014 at 07:05 PM.
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