You can also go by the Pan shape and the number of Trans Pan Bolts all of the C4's from 1964 to 1969 basically will use this same Gasket and Filter. And if your Floor Shifter has the P, R, D1, D2, L Gear Pattern than its likely still the Original Dual Range C4 that came with your car. So you could just order a 1966 C4 Pan and Filter Kit, it looks like this one. https://www.cjponyparts.com/transmi...tang-with-c4-transmission-1965-1969/p/FT1027/
The Pan Gaskets stayed the same until end of C4 production in 1981, but the filters are a little different for the newer model valve body's. Good luck. Also note that in the below Attachment on the bottom left side you can see what the Shape of the C4 / C5 Auto Trans Pan Gasket should look like. Edited
The Pan Gaskets stayed the same until end of C4 production in 1981, but the filters are a little different for the newer model valve body's. Good luck. Also note that in the below Attachment on the bottom left side you can see what the Shape of the C4 / C5 Auto Trans Pan Gasket should look like. Edited
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