Transmission
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
First you would find a Trans-Am forum instead of this Corvette one... 
You didn't say manual or auto but here's the 1979 Trans Am options
(6.6L = 403)
TRANSMISSIONS
Pontiac only issued two transmissions during the model year, the standard being the Turbo Hydra-Matic 350 three-speed automatic. Containing a first gear ratio of 2.52:1, it backed both the 403 and the 301. The governor cover features the transmission code ME or MJ against the 301, and LM or LP against the 403.
A four-speed manual was optional against the 301 with a 10.4-inch clutch; however, it was mandated against the 400 with an 11-inch clutch. Although it was given the M21 code, this close-ratio (2.43:1 first gear) unit was actually a Borg-Warner Super T-10. Codes were stamped on the rear of the side cover face: "ZD" with the 301; "UH" with the 400.
HIH, Good luck
M
You didn't say manual or auto but here's the 1979 Trans Am options
(6.6L = 403)
TRANSMISSIONS
Pontiac only issued two transmissions during the model year, the standard being the Turbo Hydra-Matic 350 three-speed automatic. Containing a first gear ratio of 2.52:1, it backed both the 403 and the 301. The governor cover features the transmission code ME or MJ against the 301, and LM or LP against the 403.
A four-speed manual was optional against the 301 with a 10.4-inch clutch; however, it was mandated against the 400 with an 11-inch clutch. Although it was given the M21 code, this close-ratio (2.43:1 first gear) unit was actually a Borg-Warner Super T-10. Codes were stamped on the rear of the side cover face: "ZD" with the 301; "UH" with the 400.
HIH, Good luck
M
Last edited by Mooser; Mar 3, 2018 at 03:58 PM.
