The main automatic transmission to implement a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was launched to the 1948 product yr. In regular driving, the Dynaflow used only the top equipment, relying on the torque multiplication with the torque convertor at lower speeds. The Dynaflow https://brookskubfh.full-design.com/detailed-notes-on-gearbox-auto-76521968