The friction bands are often used for manually picked gears (including very low variety or reverse) and operate to the planetary drum's circumference. Bands aren't utilized if the generate/overdrive range is selected, the torque getting transmitted from the sprag clutches as an alternative. The earliest kind of automatic gearbox could https://gearboxauto04890.ageeksblog.com/32704944/everything-about-gearbox-auto