The 1st automatic transmission to employ a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released for that 1948 design yr. In normal driving, the Dynaflow used just the prime gear, depending on the torque multiplication of your torque convertor at decreased speeds. The Dynaflow https://gearbox-auto54196.dgbloggers.com/34227315/the-fact-about-gearbox-auto-that-no-one-is-suggesting