The first automatic transmission to use a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released for that 1948 model year. In standard driving, the Dynaflow made use of just the top rated gear, depending on the torque multiplication in the torque convertor at lower https://arthurkjgav.bloguerosa.com/33123349/gearbox-auto-can-be-fun-for-anyone