Abrasive put on is yet another issue, often attributable to particulate matter suspended during the oil. This is often why Applied Oil Investigation for wear metals and contaminants is critical to observe gearbox wellness. Should not be used in cars with a soaked clutch/friction drives: the lubricating Qualities of STP® https://gearboxoiltreatment36788.bloguetechno.com/5-simple-techniques-for-gearbox-oil-treatment-69247809