The friction bands tend to be used for manually picked gears (for instance very low selection or reverse) and function on the planetary drum's circumference. Bands are certainly not applied when the push/overdrive vary is selected, the torque remaining transmitted with the sprag clutches rather. The Automated Guide gearbox (AMT) https://gearbox-auto60479.rimmablog.com/32954955/gearbox-auto-an-overview