I'm not an expert on Ford transmissions, but, the C4 is usually considered a lighter duty transmission as it is used in cars for the most part, the C6 however, is used in Pick up trucks and high performance cars of the time period. I would say, depending on your needs, the C6 is the better transmission.
c4
The Ford C4 transmission can be identified by the following.The pan will be square and have 11 bolts.If there are 17 bolts, it's a C6.
a c-6
no the c4 is not compatible with the 302 you would need a c6
Most have cruise o matic
You need a C6 transmission
Ford C4 Automatic Transmission refill capacity (approx): * C4 / 302 c.i. = 9 US quarts * C4 / 351 c.i. = 10.25 US quarts * C6 = 12.5 US quarts * FMX = 11.0 US quarts Use Ford "Type F" fluid Source: Haynes Ford V8 Mustang 1964 1/2 thru 1973 Automotive Repair Manual
Usually a C6 transmission.
No the c6 is a 3speed automatic transmission that was used on earlier fords.
NO
Type F for a 1971 C6
Yes. The transmission from a small block must be at 351 Windsor , And C6 transmission if the transmission is a c4 . It will not work