It had been to start with introduced in 1939 for vehicles. It consists of the fluid coupling and a few planetary gears. They collectively make 3 ahead and a person reverse velocity. There isn't any clutch for engagement and disengagement with the motor. When the left-hand log clutch meshes https://gearbox20741.pointblog.net/the-smart-trick-of-gearbox-that-nobody-is-discussing-77390083