If the tension drops, springs result in the clutch to launch. Evenly spaced ridges, called splines, line the inside and out of doors in the clutch to lock in the gears and also the clutch housing. It is possible to read more about these clutches in How Automated Transmissions Do https://clutch-kereta71580.blog-gold.com/41497761/not-known-facts-about-clutch-kereta