The friction bands are often useful for manually chosen gears (like low vary or reverse) and run within the planetary drum's circumference. Bands usually are not used once the travel/overdrive selection is chosen, the torque currently being transmitted via the sprag clutches alternatively. Dual-clutch automatic gearboxes started to appear in https://gearbox-auto30751.rimmablog.com/32953983/the-definitive-guide-to-gearbox-auto