The very first automatic transmission to implement a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was launched for your 1948 model year. In standard driving, the Dynaflow utilised just the major gear, relying on the torque multiplication of your torque convertor at lower speeds. https://gearbox-auto10852.bligblogging.com/34402713/about-gearbox-auto