The 1st automatic transmission to implement a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was launched to the 1948 model calendar year. In regular driving, the Dynaflow applied just the prime gear, relying on the torque multiplication from the torque convertor at reduce speeds. https://marcotdhii.blogerus.com/56297403/top-guidelines-of-gearbox-auto