In the event the stress drops, springs induce the clutch to release. Evenly spaced ridges, termed splines, line the inside and out of doors from the clutch to lock in the gears and also the clutch housing. You may study more details on these clutches in How Automated Transmissions Work. https://clutch-kereta86418.blogocial.com/not-known-facts-about-clutch-plate-68824573