I've just posted a project I've been working on for a little while, which is what is undoubtedly the largest and most-complete listing of Ford rear axle ID codes posted anywhere on the internet. The listing has more than 2900 codes covering virtually EVERY rear-wheel-drive differential in every Ford car, light truck, van and SUV from 1963 through 2001.

Page 01 - WBG-E thru WCN-L
Page 02 - WCN-M thru WDC-Z
Page 03 - WDD-B thru WDN-DR
Page 04 - WDM-E thru WDX-R
Page 05 - WDY-A thru WEG-S
Page 06 - WEM-A thru WFB-M
Page 07 - WFC-A thru WFF-C
Page 08 - WFG-A thru WFZ-J1
Page 09 - WGA-A thru WGZ-E
Page 10 - C001-A thru D070-A and S107G thru S156H
Page 11 - S157B thru S335C
Page 12 - S336A thru S405-E
Page 13 - S406-B thru S668H
Page 14 - S672A thru S829F
Page 15 - S832E thru SPM747-C
Page 16 - V012-A thru V052-B
Page 17 - V106A thru V497-B

Have fun!

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FORDification.com - The '67-'72 Ford Pickup Resource
'67 F-100 2WD SWB ~ '69 F-100 4WD SWB ~ '68 F-100 2WD w/7" chop