Ed, it's more likely what you saw was a "Gyro-Matic"- - - -a 2-speed manual transmission used by Dodge with an electric shift overdrive that gave the vehicle 4 forward speeds if the driver used a creative shifting technique with the kickdown switch. Chrysler ran the same basic transmission and called it an "M-6". The transmission had low and high manual shifter positions, and used an electric overdrive similar to the Borg-Warner system to give each range two speeds. It also had a fluid drive coupled to a manual clutch that would allow the engine to idle in gear and be driven like an automatic in traffic. I drove a 1951 Chrysler coupe with the M-6 transmission when I was in high school in the early 1960's.

https://www.allpar.com/threads/the-odd-m6-and-m4-four-speed-semi-automatic-transmissions.229925/

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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