The very first automatic transmission to implement a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was released for your 1948 model calendar year. In ordinary driving, the Dynaflow used just the top gear, counting on the torque multiplication of the torque convertor at decrease speeds. https://gearboxauto50244.webdesign96.com/34285776/little-known-facts-about-gearbox-auto