The 1st automatic transmission to utilize a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was released for the 1948 design 12 months. In normal driving, the Dynaflow employed just the leading gear, counting on the torque multiplication of your torque convertor at reduced speeds. https://gearbox-auto18517.arwebo.com/56727688/top-guidelines-of-gearbox-auto