Surface enhancement is an important element of a Liberty’s Gears–prepped transmission, and there are multiple steps in the process. First, the gears are shot-peened. Shot-peening relieves the existing stress in the gear (from the manufacturing process) and converts it to a compressive stress that enhances the surface strength of the gear and prevents chipping, especially on the synchronizer gears. The second step is to put the gears through a centrifugal surface-enhancement treatment that leaves the gears with a polished look (as seen above). It’s not just for appearances, though. This process enhances the face of the gears and the valleys within the gear teeth. No acids are used in the process – just a special formulation of soap and water.