[67sustang]

Hi everyone,

I have just registered to this forum and already have a question. Last year I bought a 1967 200ci AT coupe. The tag on the rear axle reads: 1st line - WCZ F1 9D3; 2nd line 3 00 8 931A

I imagine this is not the original rear axle installed at the factory, please help decoding it

67sustang

[1mach1]

Welcome to the site! Should find the answer in the classic section.

[Jay H 237]

Originally Posted by 67sustang

Hi everyone,

I have just registered to this forum and already have a question. Last year I bought a 1967 200ci AT coupe. The tag on the rear axle reads: 1st line - WCZ F1 9D3; 2nd line 3 00 8 931A

I imagine this is not the original rear axle installed at the factory, please help decoding it

67sustang

The WCZ-F1 was used behind standard and automatic tranny 250s, 289s and 302s between 1967 and 1970.

9D3 is the date the axle was produced, 1969, April, 3rd week

3 00 is the ratio, the axle is a 3.00-1

8 it is an 8" center section (pumpkin)

931A is an internal plant part number for that axle


So, with this info, your rear axle came from a 1969 Mustang that had a 250 or 302 engine. Being the axle was made near the end of April the car was a late April or a May built car.

[67sustang]

Thanks Jay,

Pretty useful information. Having a 3.00 ratio would mean that I can save some gas now since I have an inline six in it. It'll take longer to get there but will require less effort (RPMs) to maintain speed, correct?

[67sustang]

Originally Posted by 1mach1

Welcome to the site! Should find the answer in the classic section.

Thanks 1Mach1,

It's good to make contact with other Mustangs enthusiasts. I am thrilled just by working on my car, hopefully I'll have some pics soon after the paint job.