Bearings are what enable the gears to rotate easily. They are typically built from bronze or brass, they usually healthy into races (or grooves) in the gearbox housing. Contaminants can enter your gearbox oil by means of vents or the fill tube through checking/filling. Most of the time, even so, https://chancehkigf.goabroadblog.com/33178331/the-definitive-guide-to-filter-gearbox