It had been initially released in 1939 for cars. It consists of the fluid coupling and 3 planetary gears. They collectively make 3 forward and a person reverse velocity. There is not any clutch for engagement and disengagement through the motor. The copyright which unites the many planetary gears https://gearbox75297.blogsvila.com/33938963/5-tips-about-gearbox-you-can-use-today