The 1st automatic transmission to work with a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was launched with the 1948 model year. In normal driving, the Dynaflow applied just the top gear, relying on the torque multiplication of the torque convertor at decreased speeds. The https://gearboxauto54084.bloggerbags.com/39457131/gearbox-auto-can-be-fun-for-anyone