The initial automatic transmission to employ a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was released for your 1948 product 12 months. In regular driving, the Dynaflow utilised only the best equipment, depending on the torque multiplication from the torque convertor at decrease speeds. https://gearbox-auto08417.blogolenta.com/31100493/new-step-by-step-map-for-gearbox-auto