The first automatic transmission to implement a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for the 1948 design yr. In regular driving, the Dynaflow applied just the top rated equipment, relying on the torque multiplication of the torque convertor at reduced speeds. https://gearbox-auto86429.blogocial.com/top-latest-five-gearbox-auto-urban-news-69563140