The very first automatic transmission to make use of a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for the 1948 design calendar year. In normal driving, the Dynaflow used just the top equipment, relying on the torque multiplication with the torque convertor https://gearboxauto08406.alltdesign.com/top-guidelines-of-gearbox-auto-53308049