The very first automatic transmission to implement a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was introduced for the 1948 design year. In typical driving, the Dynaflow used just the best equipment, counting on the torque multiplication with the torque convertor at lessen speeds. https://erickedbax.blogcudinti.com/33899276/getting-my-gearbox-auto-to-work