The primary automatic transmission to utilize a torque converter (as opposed to a fluid coupling) was the Buick Dynaflow, which was released for the 1948 model calendar year. In typical driving, the Dynaflow made use of only the top rated gear, counting on the torque multiplication with the torque convertor https://emilianozyvss.humor-blog.com/32748258/gearbox-auto-things-to-know-before-you-buy