Principally, the automatic gearbox uses a roller clutch for routine upshifts/downshifts. It operates just like a ratchet. It transmits the torque only in a single path by free-wheeling or overrunning in another. The advantage of this type of clutch is it eliminates the opportunity of simultaneously applying the clutch release https://augustegfcz.ssnblog.com/32888800/gearbox-auto-options