The friction bands tend to be used for manually picked gears (which include very low array or reverse) and function around the planetary drum's circumference. Bands aren't used once the drive/overdrive vary is selected, the torque staying transmitted with the sprag clutches alternatively. Inside-combustion engines operate at higher speeds, so https://gearbox-auto65307.webbuzzfeed.com/34295375/considerations-to-know-about-gearbox-auto