Rear Axle Assembly Codes
1970 and earlier axle code example: ZB 01 01 G E
Ratio | Month | Day | Plant | Posi Source |
See Below: |
01 = January 02 = February 03 = March 04 = April 05 = May 06 = June 07 = July 08 = August 09 = September 10 = October 11 = November 12 = December |
01 = 1st 02 = 2nd 03 = 3rd 04 = 4th 05 = 5th 06 = 6th 07 = 7th 08 = 8th 09 = 9th 10 = 10th etc... |
B = Buick C = Buffalo D = Cadillac G = Detroit Gear & Axle K = GM of Canada M = Pontiac/Canada O = Oldsmobile P = Pontiac W = Warren, MI |
- = No positraction D = Dana Positraction Differential E = Eaton Positraction Differential G = Detroit G&A Positraction Carrier O = Oldsmobile Positraction Carrier W = Warren/Warner Motive |
1971 and later rear axle code example: GX G 218 D E
Ratio | Plant | Day of Year | Shift | Posi Source |
See Below: |
B = Buick C = Buffalo D = Cadillac G = Detroit Gear & Axle K = GM of Canada M = Pontiac/Canada O = Oldsmobile P = Pontiac W = Warren, MI |
001 = January 1st 002 = January 2nd 031 = January 31st etc... |
D = Day shift N = Night shift 1 = Day shift 2 = Night shift |
- = No positraction D = Dana Positraction Differential E = Eaton Positraction Differential G = Detroit G&A Positraction Carrier O = Oldsmobile Positraction Carrier W = Warren/Warner Motive |
Year | Model | Rear gear | Teeth count | Std 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 | 3.90 | 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 | 3.90 | 39/10 | WK | YK |
1967 | Tempest | 4.33 | 39/9 | YL | |
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 | 3.90 | 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 | 3.90 | 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 | 3.90 | 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 | 3.90 | 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 | 3.90 | 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 | 3.90 | 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 | 3.90 | 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 | 4.10 | 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 |
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 | 3.90 | 39/10 | ZP 4 pinion | |
1967 | Firebird | 4.33 | 39/9 | ZR 4 pinion |