It was 1st launched in 1939 for automobiles. It contains the fluid coupling and three planetary gears. They collectively make three forward and one reverse pace. There's no clutch for engagement and disengagement from your motor. So by locking any one’s equipment, we may get a very distinct pace. https://gearbox86307.dailyblogzz.com/34355564/the-best-side-of-gearbox