The initial automatic transmission to implement a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was launched to the 1948 model calendar year. In regular driving, the Dynaflow utilized just the best gear, relying on the torque multiplication on the torque convertor at reduced speeds. https://gearboxauto15814.get-blogging.com/34315737/an-unbiased-view-of-gearbox-auto