The manual valve is just what the change lever hooks around. Based on which equipment is selected, the handbook valve feeds hydraulic circuits that inhibit specified gears. For example, Should the shift lever is in 3rd gear, it feeds a circuit that stops overdrive from engaging. This know-how has existed https://gearboxauto17383.bloguetechno.com/the-basic-principles-of-gearbox-auto-69248186