It had been 1st launched in 1939 for automobiles. It consists of the fluid coupling and 3 planetary gears. They collectively make three ahead and 1 reverse velocity. There is no clutch for engagement and disengagement within the engine. Bevel gearboxes have spiral and straight tooth shapes. These gearboxes https://gearbox55208.blogrenanda.com/40076347/the-best-side-of-gearbox