The bands are tightened around the ring gear to stop it turning, plus the clutches are used to lock the Sunlight gear and planets. The park posture commonly features a lockout operate (such as a button on the aspect on the gear selector or necessitating the brake pedal be pressed) https://gearboxauto60370.blog-a-story.com/14358671/the-basic-principles-of-gearbox-auto