08-07-2023, 05:07 PM

Mark66

Senior Member

Join Date: May 2004

Location: Houston, Texas

Posts: 170

Correct 1966 rear differential cover gasket

I am looking for the correct rear differential cover gasket for a 3.42 safe-t-track rear end out of a 1966 Pontiac Grand Prix. The standard gasket I bought - although of the correct configuration - is only about 10 inches tall and needs to be 11 inches tall.

Since all 1966 Big Pontiacs used the same rear differential cover gasket, I do not know why I am having this problem. My fallback is to use a Permatex product instead.

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