The primary automatic transmission to implement a torque converter (in place of a fluid coupling) was the Buick Dynaflow, which was introduced for that 1948 product 12 months. In normal driving, the Dynaflow utilized only the top gear, counting on the torque multiplication from the torque convertor at reduce speeds. https://gearbox-auto10639.ambien-blog.com/40603538/top-guidelines-of-gearbox-auto