| abstract |
The present invention relates to a wet friction clutch having a cellulose-based friction lining surface-coated with silica-based particles, or an apparatus comprising the clutch, comprising a large amount of lubricating viscosity oil and small amounts of effective amounts of (a) an ashless dispersant, (b) To a lubricant composition comprising (c) a borated detergent, and optionally (d) an auxiliary friction modifier, to a wet friction clutch-lubricant system. |