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Old 04-16-2002, 03:55 PM
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Unhappy whats the difference between a 66 & 75 C4?

hey i got a 66 & a 75 C4 having trouble finding a rebuild kit for the 66 but have found many for the 75 any body know the diff. and wich one should i keep Oh im running a 302 just in case you need the info

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Old 04-17-2002, 08:03 AM
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The only thing I know for sure is that the 66 has an inferior valve body. Unlike the 75, the 66 has a wierd valve body where the gear selection is either 1(L),1-2-3, or 2-3. The 75 should have the gear selection be 1,2,1-2-3. So, with a 75 you can hold each gear, whereas the 66 you have to shift out of L, and then back to low to hold 2nd gear. Sounds kinda confusing, i hope i explained it well enough. They both have basically the same internals, i dont know exactly what the difference is, but I think I would go with the 75 if i were you. I have a 66 c4 with a shift kit in my mustang and it works fine except the 2-3 shift is way softer than the 1-2 shift. Supposedly its because of the primitive valve body. Ford replaced them in 67 with better ones.
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Old 04-17-2002, 06:07 PM
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for a kit for early or later C4 go here www.bulkparts.com they have parts for both
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