The main automatic transmission to work with a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was released for the 1948 model yr. In typical driving, the Dynaflow utilized just the leading gear, depending on the torque multiplication from the torque convertor at decrease speeds. https://cruzdsfqa.bloggadores.com/33003042/top-latest-five-gearbox-auto-urban-news