The 1st automatic transmission to utilize a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was released for that 1948 product calendar year. In regular driving, the Dynaflow employed only the top equipment, relying on the torque multiplication of your torque convertor at decreased speeds. https://gearbox-auto88630.azzablog.com/33817250/gearbox-auto-an-overview