It had been 1st launched in 1939 for automobiles. It consists of the fluid coupling and a few planetary gears. They collectively make 3 forward and one reverse velocity. There is no clutch for engagement and disengagement from the engine. I’m Discovering Mech and drastically value your facts. I https://gearbox31852.onesmablog.com/details-fiction-and-gearbox-74405124