The initial automatic transmission to make use of a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was introduced to the 1948 product year. In usual driving, the Dynaflow used just the top rated equipment, relying on the torque multiplication with the torque convertor at https://gearboxauto13569.thenerdsblog.com/39562881/the-ultimate-guide-to-gearbox-auto