FMX tailhousing real seal problem

[andy72]

So I bought a rear seal for my 1972 Mach's FMX tranny off of Ebay. It doesn't fit my FMX. My rear seal is about 2 1/2" across, and the driveshaft yoke diameter seems to be about 1 11/16". The seal I got off Ebay is smaller. It's about 2 3/8" across and has an inner hole of about 1 1/2". I tried to google "ford fmx rear seal specs", "driveshaft yoke diameter" and a bunch of other things, but got nowhere.

Does anybody know if there were different tailhousing rear seals for an FMX?

I own a C4 and couple of C6's but this is my first FMX.

 

[rocket366]

This one from rockauto may be correct?

http://www.rockauto.com/en/moreinfo.php?pk=1840290&cc=1132861&jsn=479

Confirm measurements!

Paul

 

[piper62j]

If you have the old seal still available and not destroyed from removing it, there is a part number on it that you can cross reference for a replacement..

 

[mach1000]

I had same issue with the seal.

Check out my post.

"Ok I figured it out. All the parts stores have the C4 rear seal listed for the FMX. FMX is same as C6. Correct part number for National brand is part # 7300S.

So anyone else out there need a rear seal might better ask for C6 seal if you go to Pep, Advanced or the zone."

http://www.7173mustangs.com/thread-ford-fmx-trans-rear-main-seal-and-identification-help

 

[andy72]

Thanks everyone. The ebay seller claims my order must have gotten mixed up with another order. He said he'd send out the correct seal to me. Paul, you're info confirmed my seal size. Mach 1000, I ran into your post last night doing a google search. Great info guys! Thanks again