The first automatic transmission to implement a torque converter (as an alternative to a fluid coupling) was the Buick Dynaflow, which was introduced with the 1948 design year. In ordinary driving, the Dynaflow utilised just the leading equipment, depending on the torque multiplication of your torque convertor at reduced speeds. https://gearbox-auto32974.blogpixi.com/34390494/new-step-by-step-map-for-gearbox-auto