Bearings are what allow the gears to rotate smoothly. They are usually produced outside of bronze or brass, and so they in good shape into races (or grooves) while in the gearbox housing. There are two main types of transmissions: computerized and manual. Computerized transmissions use fluid couplings in place https://filter-gearbox99876.pages10.com/top-latest-five-filter-gearbox-urban-news-69430233