The primary automatic transmission to work with a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 product year. In standard driving, the Dynaflow employed just the best equipment, relying on the torque multiplication with the torque convertor at reduce speeds. https://cristianbikkj.ourcodeblog.com/34323658/top-gearbox-auto-secrets