The friction bands are often used for manually selected gears (which include small variety or reverse) and work about the planetary drum's circumference. Bands usually are not applied if the push/overdrive variety is selected, the torque being transmitted from the sprag clutches in its place. The Automated Guide gearbox (AMT) https://gearboxauto85306.ziblogs.com/33899494/the-fact-about-gearbox-auto-that-no-one-is-suggesting