The main automatic transmission to implement a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 model calendar year. In ordinary driving, the Dynaflow applied only the best gear, depending on the torque multiplication with the torque convertor at decrease speeds. https://gearbox-auto10741.blog5star.com/34633526/5-simple-techniques-for-gearbox-auto