[Jon Dailey]

Does anyone know what the codes are on the rear axle of a '79 T/A. I would like to know what gear ratio my T/A has. I remember reading it in an issue of HPP, but I have looked through all of my back issues and I can't seem to find it. Thanks.

[Jon Dailey]

Does anyone know what the codes are on the rear axle of a '79 T/A. I would like to know what gear ratio my T/A has. I remember reading it in an issue of HPP, but I have looked through all of my back issues and I can't seem to find it. Thanks.

[Steve C.]

I have the following, however I'm not sure if they are model year specific:
COX = 3.55
COZ = 3.73
COL = 3.36
COV = 3.31
Chalk mark both the tire and the driveshaft. Rotate both tires simultaneously one full turn and count how many times the driveshaft turns. This will give you the approximate drive ratio. Possibly this will be close enough to confirm these codes are correct for your model year.

[Held for Ransom]

Listed in June 1995 of "High Performance Pontiac" Number Crunching article is as follows: "2.41-2PJ(Std), 2PS(Safe-T-Track); 2.56-2PH(Std), 2PT(Safe-T-Track); 3.08-2PC(Std), 2PW(Safe-T-Track); 3.23-2PD(Std), 2PX,2PP(Safe-T-Track); 3.42-2PE(Std),2PY,2PO*(Safe-T-Track). *A 3.42 axle is listed in the service manual, but no such option shows up on the option sheets."

[This message has been edited by Held for Ransom (edited 09-15-2000).]

[This message has been edited by Held for Ransom (edited 09-15-2000).]