The guide valve is exactly what the shift lever hooks as much as. Based on which gear is chosen, the guide valve feeds hydraulic circuits that inhibit specific gears. As an illustration, If your change lever is in 3rd equipment, it feeds a circuit that forestalls overdrive from partaking. In https://gearboxauto42849.suomiblog.com/5-easy-facts-about-gearbox-auto-described-49770351