The friction bands are often used for manually selected gears (for example minimal variety or reverse) and operate over the planetary drum's circumference. Bands aren't used when the drive/overdrive vary is selected, the torque becoming transmitted by the sprag clutches as a substitute. When the auto is safely in park, https://gearboxauto44207.blog5star.com/34269053/the-ultimate-guide-to-gearbox-auto