The very first automatic transmission to utilize a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 design yr. In typical driving, the Dynaflow utilised just the major gear, relying on the torque multiplication of your torque convertor at lower speeds. https://gearboxauto42951.fireblogz.com/65413031/gearbox-auto-can-be-fun-for-anyone