9 inch rear end tag translation

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May 10, 2010 | 09:32 PM

weldworks54

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9 inch rear end tag translation

can somebody translate a 9 inch rear end tag and tell me what ratio the ring gear and pinion is? tag reads WDM-AG1 5FD 3 00 9 344B

May 10, 2010 | 09:38 PM

Rockstone

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From: Sin City

Ford 9" 3.00:1 non-limited slip 31 spline

May 10, 2010 | 09:52 PM

weldworks54

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thanks thats what i was affraid of. bought it out of a junk yard sight unseen for a 100 bucks. told them i needed a 410 ratio to match my front end. they said it was but when it was delivered and i read the tag. i knew it wasnt and needed a second opion to be sure i wasnt reading the tag wrong. well at least i got a spare set of 31 spline axels now. thanks again

May 26, 2010 | 10:48 AM

hobie7179

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9" rear end

I have a 9" rear end I know nothing about. I have a tag that reads:
WDC-CK4 OJD
3.25 9 103A
I know its a 3.25 ratio and open with a 9" ring gear. But what year is it? What is it out of? I have no idea. I was hoping to narrow it and add a posi to it. Is this even possible? Any help would be great.
Thanks

May 26, 2010 | 11:00 AM

Rockstone

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From: Sin City

Ford/Mercury passenger car 1968-71, 3.25:1, non-limited, 28 spline.

May 26, 2010 | 11:17 AM

hobie7179

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Thats great, I have been searching everywhere for that kinda info. how did you find it? Do you know if it is possible to upgrade and narrow this rear?

Thanks for your help.

May 29, 2011 | 07:43 PM

lelshaddai

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Rear End Tag

I am trying to translate this rear end tag. I am trying to find a different third member that will fit. Not all is clear. It was supposed to be from a 72 F-100

WDM-8(?) 1E8
3.70 8.7 302A(?)

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May 30, 2011 | 10:24 AM

lelshaddai

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Thank you, This is in a 1950 Ford F1 with a 700-R4 tranny, 350 engine. What would be the best gear ratio for the third member to have adequate speed off the line but still maintain freeway cruise? It is a 3.70 now.

May 30, 2011 | 12:50 PM

#10

78 PEB

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From: Ideeho

3:70's arent bad for what youre after.............................Especially with the 700R4 overdrive...............you probably cant come up with much better combo.