The primary automatic transmission to make use of a torque converter (rather than a fluid coupling) was the Buick Dynaflow, which was introduced for that 1948 product year. In typical driving, the Dynaflow applied only the best gear, relying on the torque multiplication with the torque convertor at lessen speeds. https://gearbox-auto21852.loginblogin.com/41511598/how-much-you-need-to-expect-you-ll-pay-for-a-good-gearbox-auto