The first automatic transmission to use a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released for the 1948 model yr. In regular driving, the Dynaflow utilized only the top gear, counting on the torque multiplication in the torque convertor at reduce speeds. The Dynaflow https://mariopwzbb.idblogmaker.com/33276377/the-basic-principles-of-gearbox-auto