The first automatic transmission to utilize a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was launched with the 1948 model 12 months. In ordinary driving, the Dynaflow utilized just the top rated equipment, relying on the torque multiplication on the torque convertor at reduced speeds. https://gearbox-auto29741.slypage.com/34361766/the-ultimate-guide-to-gearbox-auto