| abstract |
Provided is a zinc-free transmission oil composition for use in construction machinery, comprising: a major amount of an oil of lubricating viscosity, a dithiophosphorylated carboxylic acid compound, a phenate detergent, a friction modifier, and greater than 0.05 wt. % of sulfur-containing wear inhibitors. Also provided is a method of lubricating a transmission of a construction machine, comprising lubricating the transmission with the zinc-free transmission oil composition. |