1969 GTO Rear Axle Codes

Differential Ratio

Sales Code

Non Safe-T-Track Code

Safe-T-Track Code

H.D. Safe-T-Track

2.56

C

WB

XB

N/A

2.78

D

WC

XC

N/A

2.93

E

WD

XD

N/A

3.08

F

WE

XE

N/A

3.23

G

WF

XF

N/A

3.36

H

WG

N/A

XG

3.55

K

WH

N/A

XH

3.90

P

N/A

N/A

XK

4.33

S

N/A

N/A

XM

A sticker with the code was applied to the left brake drum.
The code was also stamped in the axle housing to the left of the carrier.