The primary automatic transmission to employ a torque converter (as an alternative to a fluid coupling) was the Buick Dynaflow, which was launched for that 1948 design calendar year. In ordinary driving, the Dynaflow made use of just the leading equipment, counting on the torque multiplication in the torque convertor https://gearbox-auto19641.thezenweb.com/the-5-second-trick-for-gearbox-auto-71828981