The first automatic transmission to use a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was released to the 1948 design year. In regular driving, the Dynaflow used only the major equipment, depending on the torque multiplication on the torque convertor at decreased speeds. The Dynaflow https://gearboxauto85183.creacionblog.com/33959122/the-smart-trick-of-gearbox-auto-that-nobody-is-discussing