It was to start with introduced in 1939 for vehicles. It is made of the fluid coupling and three planetary gears. They collectively make 3 forward and a single reverse pace. There is not any clutch for engagement and disengagement through the engine. Torque converter does the identical perform https://josueoomjh.bloggazzo.com/32887628/how-much-you-need-to-expect-you-ll-pay-for-a-good-gearbox