It had been first introduced in 1939 for cars. It is made up of the fluid coupling and 3 planetary gears. They collectively make three forward and one particular reverse velocity. There isn't a clutch for engagement and disengagement through the motor. Most transmissions in fashionable vehicles use synchromesh https://gearbox88631.bligblogging.com/34408332/the-definitive-guide-to-gearbox