The initial automatic transmission to employ a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was introduced to the 1948 product 12 months. In standard driving, the Dynaflow used only the top rated equipment, relying on the torque multiplication on the torque convertor at decreased speeds. https://zionisxju.liberty-blog.com/33771818/top-latest-five-gearbox-auto-urban-news