The 1st automatic transmission to employ a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was launched for the 1948 design year. In usual driving, the Dynaflow utilized only the best gear, depending on the torque multiplication in the torque convertor at decrease speeds. The Dynaflow https://gearbox-auto08517.blogdanica.com/34105306/gearbox-auto-can-be-fun-for-anyone