The primary automatic transmission to use a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was released with the 1948 product calendar year. In ordinary driving, the Dynaflow employed only the prime gear, relying on the torque multiplication of the torque convertor at reduced speeds. The https://claytonjrwzd.madmouseblog.com/14274338/gearbox-auto-things-to-know-before-you-buy