When the force drops, springs cause the clutch to launch. Evenly spaced ridges, called splines, line the inside and out of doors from the clutch to lock in to the gears and the clutch housing. You'll be able to go through more details on these clutches in How Automated Transmissions https://clutchplate65297.worldblogged.com/39036381/the-basic-principles-of-clutch-kereta