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