Rusty Nuts ... 

Disclaimer...
The following information was gathered from various sources.  Most of the following information was published as articles in various car magazines and manuals. Some of it was furnished from various web sites.  I had copied and saved the information into a spiral tablet and saved it for personal use.

I do not recall the publication title, nor the authors names. I do believe that the information has been published by various others over the years. If anyone recalls exactly which magazines and who the author was that this data appeared in, please let me know so I can give credit to the proper individuals.

Being as it is good information.. I thought that I would share it.


1965 - 1979  Nova Axle Ratio Code Table

BA, CBA,  DL,  etc.......

CODE Prefix

B _ C_ D_ F_ G_ J_ P_ Q_ T_ 2_

 

 

 

 

 

Code B_

Code

Year

Ratio

Notes

BA

65/66/67

3.08

Open 10-bolt

BA

68/69

2.56

Open 10-bolt

BB

68/69

2.56

posi 10 bolt

BC

65/66/67/68/69

3.36

Open10 bolt

BD

68/69

3.36

posi 10-bolt

BE

65/66/67

3.08

Posi 10 bolt

BF

65/66/67

3.36

Posi 10 bolt

BG

65/66/67

3.55

Posi 10 Bolt

BH

66/67

3.55

open

BI

68/69

2.73

open

BJ

65/66

3.08

open (metallic brakes) 10 bolt

BK

65/66

3.08

posi (metallic brakes) 10 bolt

BK

68

2.73

open

BL

65/66

3.36

open (metallic brakes) 10 bolt

BL

68/69/71

3.07

open 12-bolt

BM

65/66

3.36

posi (metallic brakes) 10 bolt

BM

68/69/71

3.31

open 12-bolt

BN

65/66/68/69

3.55

open (metallic brakes) 10 bolt

BO

66

3.55

posi (metallic brakes)

BO

69

3.73

open 12-bolt

BP

68/69

2.73

open

BQ

66/67

3.31

open 12-bolt (327 Special Hi-Per)

BQ

68

2.73

posi 12-bolt

BQ

69

2.73

posi

BR

66/67/68/69/71

3.07

posi 12-bolt

BS

66/67/68/69/71

3.31

posi 12-bolt

BT

66/67

3.07

open 12-bolt (metallic brakes)

BT

68/69

3.55

posi

BU

66/67

3.07

posi 12-bolt (metallic brakes)

BU

68/69

3.73

posi 12-bolt

BV

66/67

3.31

open 12-bolt (metallic brakes)

BV

68/69

4.10

posi 12-bolt

BW

66/67

3.31

posi 12-bolt (metallic brakes)

BW

68/69

4.56

posi 12-bolt

BX

65

2.73

open (327 - powerglide)

BX

68/69

4.88

posi 12-bolt

BY

65

2.75

posi

BZ

65

2.73

open (metallic brakes)

 



Nova Axle Ratio Code Table

Code C_  

Code

Year

Ratio

Notes

CBA

70

2.56

Open 10-bolt

CBB

70

2.56

posi 10-bolt

CBC

 

3.36

open 10-bolt

CBD

 

3.36

posi 10-bolt

CBL

 

3.07

open 12-bolt

CBM

 

3.31

open 12-bolt

CBN

 

3.55

open

CBP

 

2.73

open 10-bolt

CBR

 

3.07

posi 12-bolt

CBS

 

3.31

posi 12-bolt

CBT

 

3.55

posi

CBW

 

4.10

posi 12-bolt

CPA

 

3.08

open 10-bolt

CPE

 

3.08

posi 10-bolt

CPI

 

2.56

open 10-bolt

CPJ

 

2.56

posi 10-bolt

CPO

 

3.08

open 10-bolt

CPR

 

3.08

posi 10-bolt

CPX

 

2.73

posi 10-bolt

 


Nova Axle Ratio Code Table

Code D_

Code

Year

Ratio

Notes

DA

62/63/64

3.36

open

DB

62/63/64

3.08

open

DC

62/63/64

3.55

open (4cyl - 3 speed manual)

DD

62/63/64

3.55

posi (4cyl)

DE

62/63/64

3.36

posi

DF

62/63/64

3.08

posi

DH

62/63/64

3.08

Posi (6 cyl)

DJ

62/63/64

3.08

open (metallic brakes)

DK

62/63/64

3.08

posi (metallic brakes)

DL

62/63/64

3.36

open (metallic brakes)

DM

62/63/64

3.36

posi (metallic brakes)

DN

62/63/64

3.55

open (4cyl - metallic brakes)

DP

62/63/64

3.55

posi (4cyl - metallic brakes)

 


Nova Axle Ratio Code Table

Code F_

Code

Year

Ratio

Notes

FD

65

2.73

posi (metallic brakes)

FG

76

3.08

open

FI

66/67

3.55

open 12-bolt (close ratio 4 speed)

FJ

66/67

3.55

open 12-bolt (metallic brakes)

FK

66/67

3.55

posi 12-bolt (metallic brakes)

FK

76

2.73

open

FL

66/67

3.55

posi 12-bolt

FM

66/67

3.73

open

FN

66/67

3.73

open (metallic brakes)

FO

66/67

3.73

posi (metallic brakes)

FP

66/67

3.73

posi

FQ

66/67

3.07

open 12-bolt (327 Special Hi-Per)

 


Nova Axle Ratio Code Table

Code G_

Code

Year

Ratio

Notes

GF

75

3.42

open

GJ

71

2.56

open 10-bolt

GK

71

2.56

posi 10-bolt

GR

71

3.08

open 10-bolt

GS

71

3.08

posi 10-bolt

GT

71/72

3.36

open 10-bolt

GW

71

3.36

posi 10-bolt

 


Nova Axle Ratio Code Table

Code J_

Code

Year

Ratio

Notes

JA

73/74

2.73

open

JA

75

2.56

open

JB

72/75

2.73

open

JB

73/74

3.08

open

JC

72

3.08

open

JC

73/74

3.42

open

JD

75

3.08

open

JE

72

3.42

open

JI

72

3.08

open

JK

72

3.42

open

JM

73/74

2.73

posi

JN

72

2.73

posi

JN

73/74

3.08

Posi

JP

73/74

3.42

posi

JQ

72

3.08

posi

JS

72

3.42

posi

JU

75

2.56

open

JV

75

2.73

open

JW

72

3.08

posi

JX

75

3.08

open

JY

72

3.42

Posi

JZ

75

3.42

open

 



Nova Axle Ratio Code Table

Code P_  

Code

Year

Ratio

Notes

PA

68/69

3.08

open 10-bolt

PA

75/76/77/78/79

2.73

open

PB

69

2.56

open 10-bolt

PC

69

2.56

Posi 10-bolt

PC

75/76/77/78/79

3.08

Open

PE

68/69

3.08

posi 10-bolt

PE

78/79

3.42

open

PH

68

3.55

posi 10-bolt

PH

75/76/77/78/79

2.56

open

PI

71

2.56

open 10-bolt

PJ

71

2.56

posi 10-bolt

PJ

78/79

2.41

open

PK

68

3.55

open

PL

69

3.55

open

PO

71

3.08

open 10-bolt

PR

71

3.08

posi 10-bolt

PS

78/79

2.41

posi

PT

75/76/77/78/79

2.56

posi

PU

75/76/77/78/79

2.73

posi

PW

72

2.73

open

PW

75/76/77/78/79

3.08

Posi

PX

68/69/72

2.73

posi 10-bolt

PY

75/76/77/78/79

3.42

posi

PZ

75/76/77

3.42

open

 


Nova Axle Ratio Code Table

Code Q_

 

Code

Year

Ratio

Notes

QE

68

3.55

open

QL

68

3.31

open 12-bolt


Nova Axle Ratio Code Table

Code T_

 

Code

Year

Ratio

Notes

TX

77

3.08

open

TY

 

2.73

open

TZ

 

2.56

open

 


 

Nova Axle Ratio Code Table

Code 2_ _

 

Code

Year

Ratio

Notes

2PA

75/75/77/78/79

2.73

open

2PC

75/75/77/78/79

3.08

open

2PU

75/75/77/78/79

2.73

posi

2PW

75/75/77/78/79

3.08

Posi

 

 

 

 

2TA

79

2.56

open

2TB

79

2.73

open

2TC

79

3.08

open

2TE

79

2.41

open

2TV

78

2.41

open

2TX

78

3.08

open

2TY

78

2.73

open