The main automatic transmission to employ a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was launched for the 1948 product 12 months. In standard driving, the Dynaflow utilised only the top equipment, counting on the torque multiplication from the torque convertor at lower speeds. https://garrettuvtro.luwebs.com/34328099/top-gearbox-auto-secrets