The first automatic transmission to implement a torque converter (as an alternative to a fluid coupling) was the Buick Dynaflow, which was launched for that 1948 model year. In standard driving, the Dynaflow applied only the major equipment, counting on the torque multiplication of the torque convertor at lessen speeds. https://milokqqqo.goabroadblog.com/33225427/gearbox-auto-for-dummies