It had been 1st launched in 1939 for vehicles. It includes the fluid coupling and 3 planetary gears. They collectively make 3 forward and one reverse velocity. There is no clutch for engagement and disengagement with the engine. Bevel gearboxes have spiral and straight tooth designs. These gearboxes are https://gearbox97429.tokka-blog.com/34051613/what-does-gearbox-mean