The primary automatic transmission to employ a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was introduced for the 1948 model year. In normal driving, the Dynaflow employed only the top gear, relying on the torque multiplication on the torque convertor at lessen speeds. The Dynaflow https://gearboxauto59246.pointblog.net/the-fact-about-gearbox-auto-that-no-one-is-suggesting-77379178