62 Differential date question
Thread Starter
Le Mans Master
Joined: Mar 2001
Posts: 6,240
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From: Watkinsville, GA and Glen Cove, NY
62 Differential date question
My 62 has a Posi unit dated about 2 months after my car was built. I have never really worried about it. Relatively close to me, however, I came across a correct unit that was cast 5-6 weeks before my car was built. Would this be considered in the range of possible or it it too far away. It was assembled exactly 4 weeks before my car. Thanks,
Bill
Bill
Race Director
Joined: Mar 2001
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From: Mustang OK
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If at some time in the future you wanted to have the car judged in an NCRS event, the max allowable date for parts prior to vehicle assembly is 6mo. So, that would be waaaaaaaaaaaaaaay within the range for a correctly dated rear. 
Tom Parsons
Tom Parsons
Melting Slicks
Joined: Jul 2004
Posts: 2,867
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From: Maryland
If your purchase is for NCRS purposes make sure of the following
Casting # 3789812 for 61-62 posi & that the casting is a Detroit Gear assembly. The case should have a long thin "P"
and the year portion of the casting date should be a single digit.
Casting # 3789812 for 61-62 posi & that the casting is a Detroit Gear assembly. The case should have a long thin "P"
and the year portion of the casting date should be a single digit.
