The main automatic transmission to work with a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was launched to the 1948 model 12 months. In normal driving, the Dynaflow applied only the best gear, relying on the torque multiplication of the torque convertor at lessen speeds. https://finnbaxus.ampedpages.com/top-latest-five-gearbox-auto-urban-news-60775987