The 1st automatic transmission to use a torque converter (instead of a fluid coupling) was the Buick Dynaflow, which was released with the 1948 product yr. In regular driving, the Dynaflow utilized just the major equipment, counting on the torque multiplication from the torque convertor at decreased speeds. The Dynaflow https://claytonjrwzd.madmouseblog.com/14274338/gearbox-auto-things-to-know-before-you-buy