Bearings are what enable the gears to rotate easily. They are usually created out of bronze or brass, they usually suit into races (or grooves) inside the gearbox housing. Contaminants can enter your gearbox oil by way of vents or perhaps the fill tube throughout checking/filling. More often than not, https://manuelflnnn.blogunok.com/34269777/getting-my-filter-gearbox-to-work