The very first automatic transmission to make use of a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was launched for your 1948 model calendar year. In normal driving, the Dynaflow used only the leading gear, counting on the torque multiplication from the torque convertor https://gearboxauto87429.worldblogged.com/39828403/5-simple-techniques-for-gearbox-auto