Ring gear on my third member is stamped. C7AW 4210 F + 3
Can someone ID this for me. Case stamping matches the C7AW.

Thanks

 

Its a 2.75 ratio ring gear C7A is 1967 car part...the 4210F is its ID number for locating which R&P set it goes to...the R&P set p/n is C7AZ4209J


- cs65

 

Thanks. This was what was in my 1979 f-100. Looked like it had been changed at one time. Outside case had 2.75 in yellow paint, but I wanted to double check.

Anyone know of a good website to run parts numbers through? Feel kind of handicapped always having to ask others.

 

Yeah, it's a car part number, so what?

EVERY 9" ring & pinion used on 1957/83 F100's / 1975/86 F150's carries a car part number.

C7AZ4209J .. Ring & Pinion-2.75-1.

Fits: 1967/83 F100 / 1975/86 F150 / 1967/79 Passenger Cars.

You cannot assume because it's a car part number it only fits cars.

You cannot assume because it has a 1967 prefix, that it was the only year it was used.

Prolly 60% of the parts used on trucks have car part numbers.

Take a look-see thru the FE engine section (60.7) in your truck parts catalog. Outside of specific motor mounts & brackets, damn near everything else is a car part number.