| abstract |
A lubricant comprising an overbased carbonated calcium aryl sulfonate detergent having a total base number (TBN) of at least about 640, calculated on an oil-free basis, (a) an oil of lubricating viscosity, is Effectively lubricates non-metallic surfaces in transmission synchronizers. The disclosed technique solves the problem of balancing friction requirements and anti-wear performance in a lubricated manual transmission synchronizer by the correct selection of overbased detergents and other components. |