But collectors even scrutinize the transmissions they are paired with ... The key difference between the Muncie M20 and M21 gearboxes was that the M20 was the wide-ratio model, while the M21 ...
The GTO was offered standard with a 2-speed automatic transmission, but customers could also get a 3-speed manual replacement with a Hurst shifter. Muncie M20 and M21 transmissions were also ...