Bearings are what allow the gears to rotate effortlessly. They are generally created away from bronze or brass, plus they healthy into races (or grooves) in the gearbox housing. Synchro rings have enamel on them that mesh Using the teeth about the gears, and so they even have friction supplies https://travismnlki.activosblog.com/33070802/a-simple-key-for-filter-gearbox-unveiled