The initial automatic transmission to work with a torque converter (as an alternative to a fluid coupling) was the Buick Dynaflow, which was introduced to the 1948 design year. In normal driving, the Dynaflow made use of only the best equipment, depending on the torque multiplication of your torque convertor https://gearbox-auto80135.therainblog.com/32586511/gearbox-auto-things-to-know-before-you-buy