It had been initially released in 1939 for cars. It contains the fluid coupling and 3 planetary gears. They collectively make 3 ahead and just one reverse speed. There is not any clutch for engagement and disengagement through the engine. Bevel gearboxes have spiral and straight enamel designs. These https://trentonypzba.techionblog.com/33821867/the-smart-trick-of-gearbox-that-no-one-is-discussing