the first automatic transmission came out in 1921.
the first automatic transmission came out in 1921.
when did the first automatic transmission come out?
1921
the automatic transmission was invented in 1921 by alfred horner munro of regina, saskatchewan, canada, and patented under canadian patent ca 235757 in 1923. (munro obtained uk patent gb215669 215,669 for his invention in 1924 and us patent 1,613,525 on 4 january 1927). being a steam engineer, munro designed his device to use compressed air rather than hydraulic fluid, and so it lacked power and never found commercial application. the first automatic transmission using hydraulic fluid may have been developed in 1932 by two brazilian engineers, josé braz araripe and fernando lehly lemos; subsequently the prototype and plans were sold to general motors who introduced it in the 1940 oldsmobile as the "hydra-matic" transmission. they were incorporated into gm-built tanks during world war ii and, after the war, gm marketed them as being "battle-tested."
automatic transmission
this fluid was first used in the following transmissions: 









































bullet::::- 1989 e4od (c-6 with overdrive) ford's first electronic control 4-speed automatic transmission









































bullet::::- 1990 4eat-g mazda 4-speed automatic transmission









































bullet::::- 1990 f-4eat 4-speed automatic transmission









































bullet::::- 1990 axod-e 4-speed automatic transaxle









































bullet::::- 1992 aod-e (electronic aod) 4-speed automatic transmission









































bullet::::- 1993 aod-ew/4r70w 4-speed automatic transmission









































bullet::::- 1994 ax4s 4-speed automatic transaxle









































bullet::::- 1994 cd4e batavia 4-speed automatic transmission









































bullet::::- 1995 ax4n/4f50n 4-speed automatic transmission









































bullet::::- 1995 4r44e 4-speed automatic transmission









































bullet::::- 1995 4r55e 4-speed automatic transmission









































bullet::::- 1997 5r44 5-speed automatic transmission (ford's first 5-speed automatic transmission)
mercon