At last, the driver releases the clutch pedal, Which allows the engine and transmission to reconnect and interact. This process needs to be repeated whenever the driving force would like to change gears.  A compound planetary gearset acts like two planetary gearsets blended. Find out about compound planetary gearsets and https://gearboxkeretaauto77542.theisblog.com/32716208/the-definitive-guide-to-gearbox-auto