The friction bands will often be used for manually chosen gears (which include reduced range or reverse) and run over the planetary drum's circumference. Bands are certainly not used once the drive/overdrive variety is selected, the torque being transmitted with the sprag clutches as an alternative. This type of transmission https://gearbox-auto40471.blogdal.com/34238085/5-tips-about-gearbox-auto-you-can-use-today