The friction bands are often useful for manually chosen gears (for instance very low array or reverse) and run over the planetary drum's circumference. Bands aren't utilized once the drive/overdrive array is selected, the torque getting transmitted via the sprag clutches as a substitute. The Gearbox gives the relative motion https://finnnomjh.p2blogs.com/32731387/how-gearbox-auto-can-save-you-time-stress-and-money