It was 1st introduced in 1939 for automobiles. It includes the fluid coupling and a few planetary gears. They collectively make a few ahead and a single reverse speed. There's no clutch for engagement and disengagement within the motor. The provider which unites all of the planetary gears revives https://johnnyzimqi.boyblogguide.com/32826294/the-definitive-guide-to-gearbox