The very first automatic transmission to employ a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was introduced with the 1948 design year. In ordinary driving, the Dynaflow made use of only the major gear, counting on the torque multiplication on the torque convertor at https://gearbox-auto77529.idblogz.com/34636845/5-essential-elements-for-gearbox-auto