PONTIAC Axle Gear Codes




BackWallace Racing


Code Location
  1. 1971-1975 : Front of Right hand (passenger) tube,about 3" from carrier
  2. 1970 : W/C-lock axles-Front of Right hand (passenger) tube,about 3" from carrier
  3. 1970 : non c-lock axles-: Rear of left hand (driver) tube,about 3" from carrier
  4. 1967-1969 : Rear of left hand (driver) tube,about 3" from carrier and stamped on left rear brake drum.
  5. 1966 : Rear of right hand (passenger) tube


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

YearModelRear gearTeeth countStd codeLocking code
1965GTO3.0840/13WEYE
1965GTO3.0840/13XEZE
1965GTO3.2342/13WFYF
1965GTO3.2342/13XFZF
1965GTO3.3637/11WGYG
1965GTO3.3637/11XGZG
1965GTO3.5539/11WHYH
1965GTO3.5539/11XHZH
1965GTO3.9039/10ZK
1965GTO4.3339/9ZL
1966Big Pontiac2.4141/17UBVB
1966Big Pontiac2.5641/16UCVC
1966Big Pontiac2.7341/15UDVD
1966Big Pontiac2.9341/14UEVE
1966Big Pontiac3.0840/13UFVF
1966Big Pontiac3.2342/13UGVG
1966Big Pontiac3.4241/12UHVH
1966Big Pontiac3.7341/11UKVK
1966Big Pontiac4.1137/9UMVM
1967Big Pontiac2.2939/17UAVA
1967Big Pontiac2.4141/17UBVB
1967Big Pontiac2.5641/16UCVC
1967Big Pontiac2.7341/15UDVD
1967Big Pontiac2.9341/14UEVE
1967Big Pontiac3.0840/13UFVF
1967Big Pontiac3.2342/13UGVG
1967Big Pontiac3.4241/12UHVH
1967Big Pontiac3.5539/11VJ
1967Big Pontiac3.7341/11VK
1967Big Pontiac4.1137/9VM
1967Tempest2.5641/16WBYB
1967Tempest2.7839/14WCYC
1967Tempest2.9341/14WDYD
1967Tempest3.0840/13WEYE
1967Tempest3.2342/13WFYF
1967Tempest3.3637/11WGYG
1967Tempest3.5539/11WHYH
1967Tempest3.9039/10WKYK
1967Tempest4.3339/9YL
1968Big Pontiac2.2939/17UAVA
1968Big Pontiac2.4141/17UBVB
1968Big Pontiac2.5641/16UCVC
1968Big Pontiac2.7341/15UDVD
1968Big Pontiac2.9341/14UEVE
1968Big Pontiac3.0840/13UFVF
1968Big Pontiac3.2342/13UGVG
1968Big Pontiac3.4241/12UHVH
1968Big Pontiac3.5539/11VJ
1968Big Pontiac3.7341/11VK
1968Big Pontiac4.1137/9VM
1968Tempest2.5641/16WBYB
1968Tempest2.7839/14WCYC
1968Tempest2.9341/14WDYD
1968Tempest3.0840/13WEYE
1968Tempest3.2342/13WFYF
1968Tempest3.3637/11WGZG 4 pinion
1968Tempest3.5539/11WHZH 4 pinion
1968Tempest3.9039/10WKZK 4 pinion
1968Tempest4.3339/9ZL 4 pinion
1968Firebird2.5641/16XBZB
1968Firebird2.7839/14XCZC
1968Firebird2.9341/14XDZD
1968Firebird3.0840/13XEZE
1968Firebird3.2342/13XFZF
1968Firebird3.3637/11XGZM 4 pinion
1968Firebird3.5539/11XHZN 4 pinion
1968Firebird3.9039/10ZP 4 pinion
1968Firebird4.3339/9ZR 4 pinion
1969Big Pontiac2.2939/17UAVA
1969Big Pontiac2.4141/17UBVB
1969Big Pontiac2.5641/16UCVC
1969Big Pontiac2.7341/15UDVD
1969Big Pontiac2.9341/14UEVE
1969Big Pontiac3.0840/13UFVF
1969Big Pontiac3.2342/13UGVG
1969Big Pontiac3.4241/12UHVH
1969Big Pontiac3.5539/11VJ
1969Big Pontiac3.7341/11VK
1969Big Pontiac4.1137/9VM
1969Tempest2.5641/16WBXB
1969Tempest2.7839/14WCXC
1969Tempest2.9341/14WDXD
1969Tempest3.0840/13WEXE
1969Tempest3.2342/13WFXF
1969Tempest3.3637/11WGXG 4 pinion
1969Tempest3.5539/11WHXH 4 pinion
1969Tempest3.9039/10WKXK 4 pinion
1969Tempest4.3339/9XL 4 pinion
1969Firebird2.5641/16YBZB
1969Firebird2.7839/14YCZC
1969Firebird2.9341/14YDZD
1969Firebird3.0840/13YEZE
1969Firebird3.2342/13YFZF
1969Firebird3.3637/11YGZG
1969Firebird3.5539/11YHZH
1969Firebird3.9039/10ZK 4 pinion
1969Firebird4.3339/9ZM 4 pinion
1969Grand Prix2.9341/142D reg duty - 4D med duty 4 pinion5D med duty 4 pinion
1969Grand Prix3.0840/13ZE reg duty - 4E med duty 4 pinion5E med duty 4 pinion
1969Grand Prix3.2342/13ZF reg duty - 4F med duty 4 pinion5F med duty 4 pinion
1969Grand Prix3.3637/114G med duty 4 pinion7G HD 4 pinion
1969Grand Prix3.5539/114H med duty 4 pinion7H HD 4 pinion
1969Grand Prix3.9039/107K HD 4 pinion
1970Big Pontiac2.4141/17UBVB
1970Big Pontiac2.5641/16UCVC
1970Big Pontiac2.7341/15UDVD
1970Big Pontiac2.9341/14UEVE
1970Big Pontiac3.2342/13UGVG
1970Big Pontiac3.4241/12UHVH
1970Grand Prix2.7839/14ACBC
1970Grand Prix2.9341/14ADBD 4 pinion
1970Grand Prix3.07 12 bolt43/14WTXT
1970Grand Prix3.2342/13AFBF 4 pinion
1970Grand Prix3.31 12 bolt43/13WUXU
1970Grand Prix3.55 12 bolt39/11WVXV
1970Tempest2.5641/16WBXB
1970Tempest2.7839/14WCXC
1970Tempest3.07 12 bolt43/14WTXT
1970Tempest3.0840/13WEXE
1970Tempest3.2342/13WFXF
1970Tempest3.31 12 bolt43/13WUXU
1970Tempest3.5539/11WHXH 4 pinion
1970Tempest3.55 12 bolt39/11WVXV
1970Tempest3.9039/10XK 4 pinion
1970Tempest4.3339/9XM 4 pinion
1970Firebird2.7341/15CRXCRY
1970Firebird3.0837/12COECOF
1970Firebird3.07 12 bolt43/14COSCOT
1970Firebird3.3637/11COKCOL
1970Firebird3.31 12 bolt43/13COUCOV
1970Firebird3.55 12 bolt39/11COWCOX
1970Firebird3.73 12 bolt41/11COZ
1970GTO-GP2.5641/16LJLY
1970GTO-GP2.7341/15LELS
1970GTO-GP3.0743/14LDLR
1970GTO-GP3.3143/13LGLV
1970GTO-GP3.5539/11LFLQ
1970GTO-GP3.7341/11LU
1971Big Pontiac2.5641/16UCVC
1971Big Pontiac2.7341/15UDVD
1971Big Pontiac2.7341/15YDZD
1971Big Pontiac3.0840/13NANP
1971Big Pontiac3.0840/13YFZF
1971Big Pontiac3.0840/13UFVF
1971Big Pontiac3.0840/13WPXJ
1971Big Pontiac3.2342/13UGVG
1971Big Pontiac3.2342/13WAXL
1971Big Pontiac3.2342/13YGZG
1971Big Pontiac3.4241/12NHNN
1971Big Pontiac3.4241/12UHVH
1971Big Pontiac3.4241/12WJX3
1971Big Pontiac3.4241/12YHZH
1971A-body2.5641/16WBXB
1971A-body2.7839/14WCXC
1971A-body3.07 12 bolt43/14WTXT
1971A-body3.0840/13WEXE
1971A-body3.2342/13WFXF
1971A-body3.31 12 bolt43/13WUXU
1971A-body3.5539/11WHXH
1971A-body3.55 12 bolt39/11WVXV
1971A-body3.9039/10XK 4 pinion
1971A-body4.3339/9XM 4 pinion
1971Firebird2.7341/15GZCA
1971Firebird3.0837/12GXGY
1971Firebird3.4241/12CKCJ
1971Firebird3.7341/11CG
1971Firebird4.1041/10CB
1971GP2.7839/14ACBC
1971GP3.07 12 bolt43/14WTXT
1971GP3.0840/13AEBE
1971GP3.2342/13AFBF
1971GP3.31 12 bolt43/13WUXU
1971GP3.55 12 bolt39/11WVXV
1971Ventura II2.5641/16GJGK
1971Ventura II3.0840/13GRGS
1972Big Pontiac2.5641/16UCVC
1972Big Pontiac2.7341/15UDVD
1972Big Pontiac2.7341/15NKNT
1972Big Pontiac2.7341/15YDZD
1972Big Pontiac3.0840/13NANP
1972Big Pontiac3.0840/13YFZF
1972Big Pontiac3.0840/13UFVF
1972Big Pontiac3.0840/13WPXJ
1972Big Pontiac3.2342/13UGVG
1972Big Pontiac3.2342/13NJNR
1972Big Pontiac3.2342/13WAXL
1972Big Pontiac3.2342/13YGZG
1972Big Pontiac3.4241/12YHZH
1972A and G2.5641/16WBXB
1972A and G2.7839/14WCXC
1972A and G3.07 12 bolt43/14WTXT
1972A and G3.0840/13WEXE
1972A and G3.0840/13AEBE
1972A and G3.2342/13WFXF
1972A and G3.2342/13AFBF
1972A and G3.31 12 bolt43/13WUXU
1972A and G3.5539/11WHXH
1972A and G3.55 12 bolt39/11WVXV
1972Firebird2.7341/15GZCA
1972Firebird3.0837/12GXGY
1972Firebird3.4241/12CKCJ
1972Firebird3.7341/11CG
1972X body2.5641/16GJGK
1972X body3.0840/13GRGS
1973Big Pontiac2.5641/16UCVC
1973Big Pontiac2.7341/15UDVD
1973Big Pontiac2.7341/15NKNT
1973Big Pontiac2.7341/15YDZD
1973Big Pontiac3.0840/13NANP
1973Big Pontiac3.0840/13YFZF
1973Big Pontiac3.0840/13UFVF
1973Big Pontiac3.0840/13WPXJ
1973Big Pontiac3.2342/13UGVG
1973Big Pontiac3.2342/13NJNR
1973Big Pontiac3.2342/13WAXL
1973Big Pontiac3.2342/13YGZG
1973Big Pontiac3.4241/12YHZH
1973A and G2.7341/15ACCC
1973A and G2.7341/15WAXA
1973A and G3.0840/13ADCD
1973A and G3.0840/13WCXC
1973A and G2.9341/14AFCF
1973A and G3.2342/13AECE
1973A and G3.2343/13WDXD
1973A and G3.4241/12AJCJ
1973A and G3.4241/12WEXE
1973Firebird2.7341/15GZCA
1973Firebird3.0837/12GXGY
1973Firebird3.4241/12CLCM
1973X body2.7341/15JGJV
1973X body3.0837/12JLJW
1974Big Pontiac2.7341/15UAVA
1974Big Pontiac2.7341/15UJVJ
1974Big Pontiac2.7341/15YAZA
1974Big Pontiac3.0840/13KCLC
1974Big Pontiac3.0840/13UCVC
1974Big Pontiac3.0840/13ULVL
1974Big Pontiac3.0840/13YCZA
1974Big Pontiac3.2342/13YDZD
1974Big Pontiac3.2342/13UDVD
1974Big Pontiac3.2342/13UMVM
1974Big Pontiac3.4241/12UEVE
1974Big Pontiac3.4241/12UNVN
1974Big Pontiac3.4241/12YEZE
1974Firebird2.7341/15GZCA
1974Firebird3.0837/12GXGY
1974Firebird3.4241/12CLCM
1974X body2.7341/15JAJM
1974X body3.0840/13JBJN
1974A and G2.7341/15ACCC
1974A and G2.7341/15WAXA
1974A and G3.0840/13ADCD
1974A and G3.0840/13WCXC
1974A and G2.9341/14AFCF
1974A and G2.9341/14WBXB
1974A and G3.2342/13AECE
1974A and G3.2343/13WDXD
1974A and G3.4241/12WEXE
1975Big Pontiac2.5641/16KFLF
1975Big Pontiac2.7341/15UAVA
1975Big Pontiac2.9341/14UJVJ
1975Big Pontiac2.9341/14UBVB
1975Big Pontiac2.7341/15YAZA
1975Big Pontiac3.2342/13YDZD
1975Big Pontiac3.2342/13UDVD
1975Firebird2.7341/15PAPU
1975Firebird3.0840/13PCPW
1975Firebird2.5641/16PGPT
1975X body2.5641/16GAJU
1975X body2.7341/15GBJV
1975X body3.0840/13GDJX
1975A and G2.7341/15ACCC
1975A and G2.7341/15WLXL
1975A and G3.0840/13ADCD
1975A and G3.0840/13ADCD
1975A and G2.9341/14AFCF
1975A and G2.9341/14WBXB
1975A and G2.9341/14WMXM
1967Firebird2.5641/16XBZB
1967Firebird2.7839/14XCZC
1967Firebird2.9341/14XDZD
1967Firebird3.0840/13XEZE
1967Firebird3.2342/13XFZF
1967Firebird3.3637/11XGZM 4 pinion
1967Firebird3.5539/11XHZN 4 pinion
1967Firebird3.9039/10ZP 4 pinion
1967Firebird4.3339/9ZR 4 pinion