The first automatic transmission to work with a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was introduced for the 1948 product 12 months. In typical driving, the Dynaflow utilised just the major equipment, counting on the torque multiplication from the torque convertor at decreased speeds. https://gearboxauto97529.spintheblog.com/34183735/indicators-on-gearbox-auto-you-should-know