Please don't take the following as a rant, or belittling you...I've had to correct this mis-conception 100's of times on FTE.

You cannot go by C5AW to ID the year....you cannot!

This is a very common mistake here on FTE because ppl think that the casting number only refers to one year, it doesn't.

Ford used the same numbers for many years, so forget about trying to ID anything using these marks!

Besides, casting numbers cannot be cross referenced to actual part numbers.

It could be a 1965, it could be a 1972. Hell, it could be a 1987!

All that number refers to is the year it was first cast.

Cars/trucks shared many of the same parts, so even tho the casting number refers to a 1965 GALAXIE (third digit of A), the same part could be used on anything.

This isn't a Galaxie rear end from 1965 (and later) because they have rear coil springs.

And just because it was cast in 1965, that doesn't mean that it was for 1965 and later.

Ford needed to cast more, so the same casting number might be for a part that fits 1957, 1967, 1977, or 1987!

Where is it marked C5AW, on the carrier (pumpkin)? If so...here's the real info:

C2AZ-4141-B .. Carrier Assembly / fits: 1961/69 passenger cars (with large wheel bearings) & F100's / Some 1970's, all with 28 splined axle shafts.

Ford changed the dif bearings midyear 1970 to the "slim line" type.

See...just what I said...the carrier was cast in 1965, but the part fits 1962/70!

31 splined axle shafts were introduced in 1968 AS AN OPTION on F100's. Most 1968/72 F100's do not use this rear end.

The carrier/housing, most of the internal parts are not the same as a regular 9 uses, because the ring gear is 9 3/8" in diameter.

> > 2 1/4" rear brakes = 1968 thru 1983 F100's / 1975 thru at least 1991 F150's. I'd have to look and see, but the brakes prolly fit 1992/96's as well...and Bronco's beginning in 1978.