The primary automatic transmission to employ a torque converter (in lieu of a fluid coupling) was the Buick Dynaflow, which was launched for your 1948 model yr. In standard driving, the Dynaflow used only the top rated gear, counting on the torque multiplication in the torque convertor at decreased speeds. https://gearbox-auto75174.free-blogz.com/81395051/the-greatest-guide-to-gearbox-auto