The very first automatic transmission to implement a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 design year. In standard driving, the Dynaflow utilized just the leading equipment, relying on the torque multiplication with the torque convertor at reduced speeds. https://zanderbijhg.topbloghub.com/40485114/rumored-buzz-on-gearbox-auto