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Can anybody explain the differences between the c3's and c4's rear ends? Also, I know the early to 1979 were iron and after that came the aluminum type but how do these stack up to the d36 and 44? Thanks Mike
63-65 iron with dana posi units
66-70 iron with eaton posi,10-18 spider gears, small window carrier
71-79 iron 10-17 spiders, large window, redesigned caps
80-82 aluminum Dana, unique cap design
84-up aluminum Dana, st trans got D44, auto got D36, entire redesigned internals, front mount redesigned.
Mike
The 71-79 is the strongest in stock form and can be built up to handle almost anything. The weakest will be the D36. The 80-82 can be built up to handle quite a bit but is limited to mods. What are you trying to build and what year?
Mike