When the pressure drops, springs induce the clutch to launch. Evenly spaced ridges, named splines, line the inside and outside in the clutch to lock in to the gears plus the clutch housing. It is possible to examine more about these clutches in How Automatic Transmissions Get the job done. https://clutch-kereta85396.shoutmyblog.com/32251079/the-basic-principles-of-clutch-plate