rear end

not2old · Post by **not2old** » Fri Jan 05, 2007 1:06 pm

Hello, Can anyone help me de-cipher the numbers found on the rear end tag. Here are the numbers from right to left 2 lines i will show the numbers as they appear on the tag with spacing. 1st. line WDM-T 9ED
2nd line 50 8 7 311A. I tryed looking this up in the diagrams with no help

rjewkes · Post by **rjewkes** » Fri Jan 05, 2007 1:27 pm

I beleieve it is a 9" Non locking/non locker 3.11:1
Not sure on the other numbers though.

Post by **FORDification** » Fri Jan 05, 2007 2:10 pm

There is no such thing as a 3.11:1 gear ratio.

http://www.fordification.com/rearends-ford2.htm

The first three numbers on the second line is the ratio. What you reported as '50 8' is probably actually '3 50'(the first number is missing?). 'WDM-T' is a 3.50-geared non-locking 9" rearend.

rjewkes · Post by **rjewkes** » Fri Jan 05, 2007 4:29 pm

ok sorry forgot how to read them. Atleast i got non locking 9"

i was thinking though that the 3.11 was odd but was sure that was axle code. Turns out to be plant code wonder what plant is 311A?

not2old · Post by **not2old** » Fri Jan 05, 2007 5:41 pm

Yes, thanks Keith for the come back I took a real good look at the #s again it is a 3 0 sure looked like a 5 the first time. My guess then the other #s the 8 will be the month and the 7 the year and the 311A the plant it was manufactured any guess on that one?
again this is how it reads.
1st. line WDM-T 9ED
2nd. line 3 0 8 7 311A

Post by **FORDification** » Fri Jan 05, 2007 6:32 pm

It looks to me like the date code is on the first line of your tag, where the diagram on the above-linked page shows it on the second line. The date code in your case would be the '9ED' which would tranlate to the fourth week (D) of May (E), 1969.

Can you post a pic of your tag? What you're showing on the second line doesn't jive with my reference materials. (If you've got a flatbed scanner, those tags scan really nicely.)

not2old · Post by **not2old** » Fri Jan 05, 2007 8:17 pm

here is the tag I pulled off the rear end.

Post by **FORDification** » Fri Jan 05, 2007 9:40 pm

Ah-hah! See, there IS a '3' in the first position of the second line. That '3 50' is your gear ratio (assuming the tag is original to the rearend). The date code as I stated above is correct. As for the rest of the digits on the second line, I'm not sure...I've never seen one like that. I'm sure the plant code is in there somewhere, but I wouldn't know how to decipher that...not that it really matters, does it?

not2old · Post by **not2old** » Fri Jan 05, 2007 10:06 pm

Yes, the 3 was hidden behind the nut that held the tag befor removing the tag all i could see was the 5 and that threw me off. As for the rest it does'nt really matter only that it did'nt look the same as the one in the diagram.

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