dibbons
Well-Known Member
The model years mentioned in the title of this thread call for different part numbers but all the specs (including hydraulic specs) are identical in each piece.
Today I attempted to replace a rear wheel cylinder on the '65 Formula S where a previous owner swapped in a 489 case 8 3/4 differential. Although the wheel cylinder indicated for the '65 looked identical to the wheel cylinder I removed, I ran into one subtle difference: The fastener bolt diameter in the cylinder I removed was 1/4" and the threaded holes for the '65 wheel cylinder are larger. Fortunately, I had ordered a pair of rear cylinders for each production period and found the 70-75 version has the smaller (correct for me) diameter threaded hole. Hopefully this information will help another Mopar brother some day.
Today I attempted to replace a rear wheel cylinder on the '65 Formula S where a previous owner swapped in a 489 case 8 3/4 differential. Although the wheel cylinder indicated for the '65 looked identical to the wheel cylinder I removed, I ran into one subtle difference: The fastener bolt diameter in the cylinder I removed was 1/4" and the threaded holes for the '65 wheel cylinder are larger. Fortunately, I had ordered a pair of rear cylinders for each production period and found the 70-75 version has the smaller (correct for me) diameter threaded hole. Hopefully this information will help another Mopar brother some day.
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