The initial automatic transmission to utilize a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 design calendar year. In ordinary driving, the Dynaflow utilized only the top equipment, counting on the torque multiplication of the torque convertor at lessen speeds. https://gearboxauto75306.anchor-blog.com/14099193/what-does-gearbox-auto-mean