The first automatic transmission to make use of a torque converter (as an alternative to a fluid coupling) was the Buick Dynaflow, which was launched to the 1948 model calendar year. In standard driving, the Dynaflow employed just the prime gear, depending on the torque multiplication from the torque convertor https://rafaelblqsv.ja-blog.com/34232259/gearbox-auto-an-overview