Ford Differentials
The following information has been copied from the Ford 1978 Car Shop Manual Volume 1, Chassis.
Integral Carrier Axle-Conventional
Applies to Mustang II/Pinto/Bobcat
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WGB-K1..... 3.18:1..........6.75......... C2
WGB-U1..... 3.18:1..........6.75......... C2
WGF-AA..... 3.18:1..........6.75......... C2
WGF-AJ..... 2.73:1..........6.75......... C2
Integral Carrier Axle-Ford-(WER)
Applies to Ford/Mercury, Granada/Monarch
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WER-AA..... 2.47:1..........8.7.......... C2
WER-AB..... 2.47:1..........8.7.......... C2
WER-AC..... 2.47:1..........8.7.......... C2
Integral Carrier Axle-Ford-(WGX)
Applies To Fairmont/Zephyr
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WGX-A...... 2.73:1..........7.5.......... C2
WGX-B...... 3.08:1..........7.5.......... C2
WGX-C...... 2.47:1..........7.5.......... C2
Removable Carrier Axle-Ford
Driving axle identification - Lincoln Continental and Continental Mark V
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WGB-V...... 2.75:1..........9............ C2
WGB-W...... 3.00:1..........9............ C2
WGB-AB..... 2.50:1..........9............ C2
WGB-AD..... 2.75:1..........9............ C2
WGC-A...... 2.75:1..........9............ C2
WGC-K...... 2.50:1..........9............ C2
WGC-N...... 2.75:1..........9............ C2
WFV-T...... 2.75:1..........9............ T4
WFY-A...... 2.75:1..........9............ T4
WFY-K...... 3.00:1..........9............ T4
Driving axle identification - Ford and Mercury
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WDC-DW..... 2.75:1..........9............ C2
WDC-EB..... 2.75:1..........9............ C2
WDC-EE..... 3.00:1..........9............ C2
WDC-EH..... 2.75:1..........9............ C2
WDC-EK..... 3.00:1..........9............ C2
WDC-EL..... 2.50:1..........9............ C2
WDC-EM..... 2.50:1..........9............ C2
WFG-AL..... 3.00:1..........9............ T4
WFG-AA..... 2.75:1..........9............ T4
WFG-BJ..... 2.75:1..........9............ T4
Driving axle identification - LTD II, Cougar, and Thunderbird
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WEB-BF..... 2.50:1..........9............ C2
WEB-BK..... 3.00:1..........9............ C2
WEB-BM..... 2.75:1..........9............ C2
WFA-AA..... 3.00:1..........9............ T4
WFA-AH..... 3.00:1..........9............ T4
WFA-AL..... 2.75:1..........9............ T4
Driving axle identification - Mustang II, Pinto, Bobcat, Granada, Monarch and Versailles
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WDW-AB..... 2.79:1..........8............ C2
WDW-Z...... 3.00:1..........8............ C2
WDX-E...... 2.75:9..........9............ C2
WDY-AA..... 3.00:1..........8............ C2
WDY-HH..... 3.40:1..........8............ C2
WDY-S...... 3.40:1..........8............ C2
WFB-G...... 2.50:1..........9............ T4
WFB-K...... 2.50:1..........9............ T4
Traction-Lok Limited Slip Differential-Ford
Granada,Monarch,Versailles
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WFB-G...... 2.50:1..........9............ T4
WFB-K...... 2.50:1..........9............ T4
LTD II, Cougar, Thunderbird
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WFA-AA..... 3.00:1..........9............ T4
WFA-AH..... 3.00:1..........9............ T4
WFA-AL..... 2.75:1..........9............ T4
Lincoln Continental, Continental Mark V
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WFV-T...... 2.75:1..........9............ T4
WFY-A...... 2.75:1..........9............ T4
WFY-K...... 3.00:1..........9............ T4
Ford, Mercury
ID tag......Ratio...... Ring Gear.... Differential
........................Diameter (in).... type
WFG-AL..... 3.00:1..........9............ T4
WFG-AA..... 2.75:1..........9............ T4
WFG-BJ..... 2.75:1..........9............ T4
Type: C2,C4-Conventional 2-Pinion, 4-Pinion
T2,T4-Traction-Lok 2-Pinion, 4-Pinion
Notes:
For Mavericks and Comets the Granada/Monarch/Versailles tables are the ones to use as these cars are based on a lengthened Maverick chassis.
Axle codes from data plates
These codes are assembled for 70s Ford using the '78 shop manual, '75 light maintenance manual, and The Mustang Recognition guide. codes are fairly stable from 1969 to 1978, notes are made where needed. Please double check any codes not in the years 1969-1973, 1975, and 1978 since I can only assume the codes remained the same in the years my sources do not cover.
Conventional......Lock......Ratio
1.............J.........2.50
2.............K.........2.75
3.............L.........2.79
4.............M.........3.18 ('78), 2.80 ('69-'72)
5.............N.........3.07 ('75-'78) 2.83 ('69-'70)
6.............O.........3.00
7.............P.........3.40 ('73-'78) 3.10 ('69-'70)
8.............Q.........2.73 ('78) 3.20 ('69-'70) 3.18 ('72)
9.............R.........3.25
A.............S.........3.50
B.............T.........2.47 ('78) 3.07 ('69-'72)
C.............U.........3.55 ('72) 3.08 ('69-'70)
D.............V.........3.91
E.............W.........4.30
F.............X.........2.33 ('70)
G.............X.........3.55 ('73-'78)
H.......................3.78 ('72)
Y.......................3.08 ('78) 4.11 lock ('72)
Disclaimer: Not responsible for any errors, etc.