It was initial introduced in 1939 for cars. It contains the fluid coupling and 3 planetary gears. They collectively make three ahead and just one reverse pace. There is absolutely no clutch for engagement and disengagement from your motor. A Clutch shaft does the job of a driving shaft. https://spencerzndnw.webdesign96.com/34286443/the-smart-trick-of-gearbox-that-no-one-is-discussing