The 1st automatic transmission to implement a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was introduced with the 1948 product calendar year. In standard driving, the Dynaflow utilized just the leading gear, counting on the torque multiplication from the torque convertor at reduced speeds. The https://gearbox-auto92346.bloggazza.com/32824684/the-fact-about-gearbox-auto-that-no-one-is-suggesting