The initial automatic transmission to work with a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was launched for that 1948 design calendar year. In typical driving, the Dynaflow applied just the best equipment, relying on the torque multiplication with the torque convertor at reduce speeds. https://rafaelblqsv.ja-blog.com/34232258/the-greatest-guide-to-gearbox-auto