This Page Last Updated on: Saturday, September 23, 2006 11:14 PM


Pontiac Rear End Gear Codes
Year Model Rear Gear Teeth Count Standard Code Locking Code
1965 GTO 3.08 40/13 WE YE
1965 GTO 3.08 40/13 XE ZE
1965 GTO 3.23 42/13 WF YF
1965 GTO 3.23 42/13 XF ZF
1965 GTO 3.36 37/11 WG YG
1965 GTO 3.36 37/11 XG ZG
1965 GTO 3.55 39/11 WH YH
1965 GTO 3.55 39/11 XH ZH
1965 GTO 3.9 39/10   ZK
1965 GTO 4.33 39/9   ZL
1966 Big Pontiac 2.41 41/17 UB VB
1966 Big Pontiac 2.56 41/16 UC VC
1966 Big Pontiac 2.73 41/15 UD VD
1966 Big Pontiac 2.93 41/14 UE VE
1966 Big Pontiac 3.08 40/13 UF VF
1966 Big Pontiac 3.23 42/13 UG VG
1966 Big Pontiac 3.42 41/12 UH VH
1966 Big Pontiac 3.73 41/11 UK VK
1966 Big Pontiac 4.11 37/9 UM VM
1967 Big Pontiac 2.29 39/17 UA VA
1967 Big Pontiac 2.41 41/17 UB VB
1967 Big Pontiac 2.56 41/16 UC VC
1967 Big Pontiac 2.73 41/15 UD VD
1967 Big Pontiac 2.93 41/14 UE VE
1967 Big Pontiac 3.08 40/13 UF VF
1967 Big Pontiac 3.23 42/13 UG VG
1967 Big Pontiac 3.42 41/12 UH VH
1967 Big Pontiac 3.55 39/11   VJ
1967 Big Pontiac 3.73 41/11   VK
1967 Big Pontiac 4.11 37/9   VM
1967 Tempest 2.56 41/16 WB YB
1967 Tempest 2.78 39/14 WC YC
1967 Tempest 2.93 41/14 WD YD
1967 Tempest 3.08 40/13 WE YE
1967 Tempest 3.23 42/13 WF YF
1967 Tempest 3.36 37/11 WG YG
1967 Tempest 3.55 39/11 WH YH
1967 Tempest 3.9 39/10 WK YK
1967 Tempest 4.33 39/9   YL
1967 Firebird 2.56 41/16 XB ZB
1967 Firebird 2.78 39/14 XC ZC
1967 Firebird 2.93 41/14 XD ZD
1967 Firebird 3.08 40/13 XE ZE
1967 Firebird 3.23 42/13 XF ZF
1967 Firebird 3.36 37/11 XG ZM 4-pinion
1967 Firebird 3.55 39/11 XH ZN 4-pinion
1967 Firebird 3.9 39/10   ZP 4-pinion
1967 Firebird 4.33 39/9   ZR 4-pinion
1968 Big Pontiac 2.29 39/17 UA VA
1968 Big Pontiac 2.41 41/17 UB VB
1968 Big Pontiac 2.56 41/16 UC VC
1968 Big Pontiac 2.73 41/15 UD VD
1968 Big Pontiac 2.93 41/14 UE VE
1968 Big Pontiac 3.08 40/13 UF VF
1968 Big Pontiac 3.23 42/13 UG VG
1968 Big Pontiac 3.42 41/12 UH VH
1968 Big Pontiac 3.55 39/11   VJ
1968 Big Pontiac 3.73 41/11   VK
1968 Big Pontiac 4.11 37/9   VM
1968 Tempest 2.56 41/16 WB YB
1968 Tempest 2.78 39/14 WC YC
1968 Tempest 2.93 41/14 WD YD
1968 Tempest 3.08 40/13 WE YE
1968 Tempest 3.23 42/13 WF YF
1968 Tempest 3.36 37/11 WG ZG 4-pinion
1968 Tempest 3.55 39/11 WH ZH 4-pinion
1968 Tempest 3.9 39/10 WK ZK 4-pinion
1968 Tempest 4.33 39/9   ZL 4-pinion
1968 Firebird 2.56 41/16 XB ZB
1968 Firebird 2.78 39/14 XC ZC
1968 Firebird 2.93 41/14 XD ZD
1968 Firebird 3.08 40/13 XE ZE
1968 Firebird 3.23 42/13 XF ZF
1968 Firebird 3.36 37/11 XG ZM 4-pinion
1968 Firebird 3.55 39/11 XH ZN 4-pinion
1968 Firebird 3.9 39/10   ZP 4-pinion
1968 Firebird 4.33 39/9   ZR 4-pinion
1969 Big Pontiac 2.29 39/17 UA VA
1969 Big Pontiac 2.41 41/17 UB VB
1969 Big Pontiac 2.56 41/16 UC VC
1969 Big Pontiac 2.73 41/15 UD VD
1969 Big Pontiac 2.93 41/14 UE VE
1969 Big Pontiac 3.08 40/13 UF VF
1969 Big Pontiac 3.23 42/13 UG VG
1969 Big Pontiac 3.42 41/12 UH VH
1969 Big Pontiac 3.55 39/11   VJ
1969 Big Pontiac 3.73 41/11   VK
1969 Big Pontiac 4.11 37/9   VM
1969 Tempest 2.56 41/16 WB XB
1969 Tempest 2.78 39/14 WC XC
1969 Tempest 2.93 41/14 WD XD
1969 Tempest 3.08 40/13 WE XE
1969 Tempest 3.23 42/13 WF XF
1969 Tempest 3.36 37/11 WG XG 4-pinion
1969 Tempest 3.55 39/11 WH XH 4-pinion
1969 Tempest 3.9 39/10 WK XK 4-pinion
1969 Tempest 4.33 39/9   XL 4-pinion
1969 Firebird 2.56 41/16 YB ZB
1969 Firebird 2.78 39/14 YC ZC
1969 Firebird 2.93 41/14 YD ZD
1969 Firebird 3.08 40/13 YE ZE
1969 Firebird 3.23 42/13 YF ZF
1969 Firebird 3.36 37/11 YG ZG
1969 Firebird 3.55 39/11 YH ZH
1969 Firebird 3.9 39/10   ZK 4-pinion
1969 Firebird 4.33 39/9   ZM 4-pinion
1969 Grand Prix 2.93 41/14 2D reg-duty / 4D med-duty 4-pinion 5D med-duty 4-pinion
1969 Grand Prix 3.08 40/13 ZE reg-duty / 4E med-duty 4-pinion 5E med-duty 4-pinion
1969 Grand Prix 3.23 42/13 ZF reg-duty / 4F med-duty 4-pinion 5F med-duty 4-pinion
1969 Grand Prix 3.36 37/11 4G med-duty 4-pinion 7G HD 4-pinion
1969 Grand Prix 3.55 39/11 4H med-duty 4-pinion 7H HD 4-pinion
1969 Grand Prix 3.9 39/10   7K HD 4-pinion
1970 Big Pontiac 2.41 41/17 UB VB
1970 Big Pontiac 2.56 41/16 UC VC
1970 Big Pontiac 2.73 41/15 UD VD
1970 Big Pontiac 2.93 41/14 UE VE
1970 Big Pontiac 3.23 42/13 UG VG
1970 Big Pontiac 3.42 41/12 UH VH
1970 Grand Prix 2.78 39/14 AC BC
1970 Grand Prix 2.93 41/14 AD BD 4-pinion
1970 Grand Prix 3.07 12 bolt 43/14 WT XT
1970 Grand Prix 3.23 42/13 AF BF 4-pinion
1970 Grand Prix 3.31 12 bolt 43/13 WU XU
1970 Grand Prix 3.55 12 bolt 39/11 WV XV
1970 Tempest 2.56 41/16 WB XB
1970 Tempest 2.78 39/14 WC XC
1970 Tempest 3.07 12 bolt 43/14 WT XT
1970 Tempest 3.08 40/13 WE XE
1970 Tempest 3.23 42/13 WF XF
1970 Tempest 3.31 12 bolt 43/13 WU XU
1970 Tempest 3.55 39/11 WH XH 4-pinion
1970 Tempest 3.55 12 bolt 39/11 WV XV
1970 Tempest 3.9 39/10   XK 4-pinion
1970 Tempest 4.33 39/9   XM 4-pinion
1970 Firebird 2.73 41/15 CRX CRY
1970 Firebird 3.08 37/12 COE COF
1970 Firebird 3.07 12 bolt 43/14 COS COT
1970 Firebird 3.36 37/11 COK COL
1970 Firebird 3.31 12 bolt 43/13 COU COV
1970 Firebird 3.55 12 bolt 39/11 COW COX
1970 Firebird 3.73 12 bolt 41/11   COZ
1970 GTO-GP 2.56 41/16 LJ LY
1970 GTO-GP 2.73 41/15 LE LS
1970 GTO-GP 3.07 43/14 LD LR
1970 GTO-GP 3.31 43/13 LG LV
1970 GTO-GP 3.55 39/11 LF LQ
1970 GTO-GP 3.73 41/11   LU
1971 Big Pontiac 2.56 41/16 UC VC
1971 Big Pontiac 2.73 41/15 UD VD
1971 Big Pontiac 2.73 41/15 YD ZD
1971 Big Pontiac 3.08 40/13 NA NP
1971 Big Pontiac 3.08 40/13 YF ZF
1971 Big Pontiac 3.08 40/13 UF VF
1971 Big Pontiac 3.08 40/13 WP XJ
1971 Big Pontiac 3.23 42/13 UG VG
1971 Big Pontiac 3.23 42/13 WA XL
1971 Big Pontiac 3.23 42/13 YG ZG
1971 Big Pontiac 3.42 41/12 NH NN
1971 Big Pontiac 3.42 41/12 UH VH
1971 Big Pontiac 3.42 41/12 WJ X3
1971 Big Pontiac 3.42 41/12 YH ZH
1971 A-body 2.56 41/16 WB XB
1971 A-body 2.78 39/14 WC XC
1971 A-body 3.07 12 bolt 43/14 WT XT
1971 A-body 3.08 40/13 WE XE
1971 A-body 3.23 42/13 WF XF
1971 A-body 3.31 12 bolt 43/13 WU XU
1971 A-body 3.55 39/11 WH XH
1971 A-body 3.55 12 bolt 39/11 WV XV
1971 A-body 3.9 39/10   XK 4-pinion
1971 A-body 4.33 39/9   XM 4-pinion
1971 Firebird 2.73 41/15 GZ CA
1971 Firebird 3.08 37/12 GX GY
1971 Firebird 3.42 41/12 CK CJ
1971 Firebird 3.73 41/11   CG
1971 Firebird 4.1 41/10   CB
1971 GP 2.78 39/14 AC BC
1971 GP 3.07 12 bolt 43/14 WT XT
1971 GP 3.08 40/13 AE BE
1971 GP 3.23 42/13 AF BF
1971 GP 3.31 12 bolt 43/13 WU XU
1971 GP 3.55 12 bolt 39/11 WV XV
1971 Ventura II 2.56 41/16 GJ GK
1971 Ventura II 3.08 40/13 GR GS
1972 Big Pontiac 2.56 41/16 UC VC
1972 Big Pontiac 2.73 41/15 UD VD
1972 Big Pontiac 2.73 41/15 NK NT
1972 Big Pontiac 2.73 41/15 YD ZD
1972 Big Pontiac 3.08 40/13 NA NP
1972 Big Pontiac 3.08 40/13 YF ZF
1972 Big Pontiac 3.08 40/13 UF VF
1972 Big Pontiac 3.08 40/13 WP XJ
1972 Big Pontiac 3.23 42/13 UG VG
1972 Big Pontiac 3.23 42/13 NJ NR
1972 Big Pontiac 3.23 42/13 WA XL
1972 Big Pontiac 3.23 42/13 YG ZG
1972 Big Pontiac 3.42 41/12 YH ZH
1972 A and G 2.56 41/16 WB XB
1972 A and G 2.78 39/14 WC XC
1972 A and G 3.07 12 bolt 43/14 WT XT
1972 A and G 3.08 40/13 WE XE
1972 A and G 3.08 40/13 AE BE
1972 A and G 3.23 42/13 WF XF
1972 A and G 3.23 42/13 AF BF
1972 A and G 3.31 12 bolt 43/13 WU XU
1972 A and G 3.55 39/11 WH XH
1972 A and G 3.55 12 bolt 39/11 WV XV
1972 Firebird 2.73 41/15 GZ CA
1972 Firebird 3.08 37/12 GX GY
1972 Firebird 3.42 41/12 CK CJ
1972 Firebird 3.73 41/11   CG
1972 X body 2.56 41/16 GJ GK
1972 X body 3.08 40/13 GR GS
1973 Big Pontiac 2.56 41/16 UC VC
1973 Big Pontiac 2.73 41/15 UD VD
1973 Big Pontiac 2.73 41/15 NK NT
1973 Big Pontiac 2.73 41/15 YD ZD
1973 Big Pontiac 3.08 40/13 NA NP
1973 Big Pontiac 3.08 40/13 YF ZF
1973 Big Pontiac 3.08 40/13 UF VF
1973 Big Pontiac 3.08 40/13 WP XJ
1973 Big Pontiac 3.23 42/13 UG VG
1973 Big Pontiac 3.23 42/13 NJ NR
1973 Big Pontiac 3.23 42/13 WA XL
1973 Big Pontiac 3.23 42/13 YG ZG
1973 Big Pontiac 3.42 41/12 YH ZH
1973 A and G 2.73 41/15 AC CC
1973 A and G 2.73 41/15 WA XA
1973 A and G 3.08 40/13 AD CD
1973 A and G 3.08 40/13 WC XC
1973 A and G 2.93 41/14 AF CF
1973 A and G 3.23 42/13 AE CE
1973 A and G 3.23 43/13 WD XD
1973 A and G 3.42 41/12 AJ CJ
1973 A and G 3.42 41/12 WE XE
1973 Firebird 2.73 41/15 GZ CA
1973 Firebird 3.08 37/12 GX GY
1973 Firebird 3.42 41/12 CL CM
1973 X body 2.73 41/15 JG JV
1973 X body 3.08 37/12 JL JW
1974 Big Pontiac 2.73 41/15 UA VA
1974 Big Pontiac 2.73 41/15 UJ VJ
1974 Big Pontiac 2.73 41/15 YA ZA
1974 Big Pontiac 3.08 40/13 KC LC
1974 Big Pontiac 3.08 40/13 UC VC
1974 Big Pontiac 3.08 40/13 UL VL
1974 Big Pontiac 3.08 40/13 YC ZA
1974 Big Pontiac 3.23 42/13 YD ZD
1974 Big Pontiac 3.23 42/13 UD VD
1974 Big Pontiac 3.23 42/13 UM VM
1974 Big Pontiac 3.42 41/12 UE VE
1974 Big Pontiac 3.42 41/12 UN VN
1974 Big Pontiac 3.42 41/12 YE ZE
1974 Firebird 2.73 41/15 GZ CA
1974 Firebird 3.08 37/12 GX GY
1974 Firebird 3.42 41/12 CL CM
1974 X body 2.73 41/15 JA JM
1974 X body 3.08 40/13 JB JN
1974 A and G 2.73 41/15 AC CC
1974 A and G 2.73 41/15 WA XA
1974 A and G 3.08 40/13 AD CD
1974 A and G 3.08 40/13 WC XC
1974 A and G 2.93 41/14 AF CF
1974 A and G 2.93 41/14 WB XB
1974 A and G 3.23 42/13 AE CE
1974 A and G 3.23 43/13 WD XD
1974 A and G 3.42 41/12 WE XE
1975 Big Pontiac 2.56 41/16 KF LF
1975 Big Pontiac 2.73 41/15 UA VA
1975 Big Pontiac 2.93 41/14 UJ VJ
1975 Big Pontiac 2.93 41/14 UB VB
1975 Big Pontiac 2.73 41/15 YA ZA
1975 Big Pontiac 3.23 42/13 YD ZD
1975 Big Pontiac 3.23 42/13 UD VD
1975 Firebird 2.73 41/15 PA PU
1975 Firebird 3.08 40/13 PC PW
1975 Firebird 2.56 41/16 PG PT
1975 X body 2.56 41/16 GA JU
1975 X body 2.73 41/15 GB JV
1975 X body 3.08 40/13 GD JX
1975 A and G 2.73 41/15 AC CC
1975 A and G 2.73 41/15 WL XL
1975 A and G 3.08 40/13 AD CD
1975 A and G 3.08 40/13 AD CD
1975 A and G 2.93 41/14 AF CF
1975 A and G 2.93 41/14 WB XB
1975 A and G 2.93 41/14 WM XM