Gear Ratio Identification by RPO Codes

1985 Chevrolet S10   Rear Axle ID Codes

All T1 (4x4) Models
(except G80)

 

All T1 (4x4) Models
(with G80)

 

All S1 (2wd) Models
(except G80)

 

All S1 (2wd) Models
(with G80)

Code

Ratio

 

Code

Ratio

 

Code

Ratio

 

Code

Ratio

HCC

3.42

 

HCG

3.42

 

GAC

3.08

 

GAM

3.08

HCB

3.73

 

HCF

3.73

 

GAD

3.42

 

GAN

3.42

HCA

 4.11

 

HCD

4.11

 

GAF

 3.73

 

GAP

 3.73

HJA

3.42

 

HJD

3.42

 

GAH

3.08

 

GAR

4.11

HJB

 3.73

 

HJF

 3.73

 

GAJ

3.42

 

GAS

3.08

HJC

4.11

 

HJG

 4.11

 

GAK

 3.73

 

GAT

3.42

HKA

3.42

 

HKD

3.42

 

GAL

4.11

 

GAU

 3.73

HKB

3.73

 

HKF

 3.73

 

GYA

3.08

 

GAW

4.11

HKC

4.11

 

HKG

4.11

 

GYB

3.42

 

GYK

3.08

 

GYC

 3.73

 

GYL

3.42

GYD

4.11

 

GYN

 3.73

GYF

3.08

 

GYP

4.11

GYG

3.42

 

GYR

3.08

GYH

 3.73

 

GYS

3.42

GYJ

4.11

 

GYT

 3.73

GNH

3.08

 

GYU

4.11

GNJ

3.42

 

GNS

3.08

GNK

 3.73

 

GNT

3.42

GNL

4.11

 

GNU

 3.73

GNM

3.08

 

GNW

4.11

GNN

3.42

 

GNX

3.08

GNP

 3.73

 

GNY

3.42

GNR

4.11

 

GNZ

4.11