Bearings are what allow the gears to rotate effortlessly. They are typically built out of bronze or brass, and they in shape into races (or grooves) while in the gearbox housing. There's two major types of transmissions: computerized and manual. Computerized transmissions use fluid couplings instead of a clutch, and https://filtergearbox81357.blogdeazar.com/34260673/filter-gearbox-fundamentals-explained