The friction bands tend to be employed for manually chosen gears (like small array or reverse) and work to the planetary drum's circumference. Bands will not be applied when the push/overdrive variety is chosen, the torque remaining transmitted through the sprag clutches instead. This part wants extra citations for verification. https://gearbox-auto87306.answerblogs.com/34005930/the-basic-principles-of-gearbox-auto