The initial automatic transmission to utilize a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was launched for the 1948 product yr. In usual driving, the Dynaflow made use of only the best gear, relying on the torque multiplication from the torque convertor at decrease https://gearbox-auto21852.blazingblog.com/34161912/gearbox-auto-fundamentals-explained