Abstract: A relatively low viscosity transmission fluid composition, transmissions containing the fluids, and methods of operating motor vehicles with the fluids are described. The transmission fluid composition includes a lubricant basestock, at least one active sulfur-containing component, and at least one phosphorus-containing compound. An active sulfur atom content of the composition is greater than about 0.02 wt. %, and a ratio of active sulfur atoms to phosphorus atoms in the composition is above about 5. The composition has a viscosity at 100° C. ranging from about 4 to less than about 7 centistokes.

Abstract: A method for improving the solubility of a sulfurized extreme pressure agent in a lubricant composition and improved lubricant compositions and uses therefor. The method includes pre-blending organic acid and amine components of a lubricant additive package for the lubricant composition to provide a premixture of organic acid and amine components. The premixture is combined with a sulfurized extreme pressure agent having a viscosity of less than about 5.5 centistokes at 100° C. to provide a lubricant additive package. By use of the foregoing process, a turbidity characteristic of the lubricant composition containing the additive package is lower than a turbidity characteristic of a lubricant composition that is made by combining the organic acid and amine components with the sulfurized extreme pressure agent in the absence of the premixture.

Abstract: The present disclosure provides a method for lubricating a gear or transmission comprising contacting said gear or transmission with a lubricant composition wherein said lubricant composition has an ISOT score of about 3.0 or lower for varnish on the glass beaker or glass rod and a L-60-1 carbon/varnish (C/V) rating of at least about 7.5 and a L-60-1 sludge rating of at least about 9.4 and wherein said lubricant composition is substantially free of boron and has a total phosphorus content of less than about 500 ppm The present disclosure also provides a method for providing a boron-free lubricant composition capable of achieving a satisfying score on the ISOT test and the L-60-1 test comprising combining with a base oil, a lubricant additive package comprising a dispersant. and wherein the lubricant composition is substantially free of boron and has a total phosphorus content of less than about 500 ppm.

Abstract: An additive composition and lubricating fluid are disclosed that provide high steel-on-paper friction durability, good metal-metal extreme pressure performance characteristics and synchronizer performance. The lubricating fluid includes a base oil, a succinimide dispersant, a succinimide friction modifier, and a phosphonate. Also disclosed is a method for lubricating a dual clutch transmission employing a plurality of wet clutches, with the lubricating fluid of the disclosure.

Abstract: The present disclosure relates to a method for making a Universal Tractor Transmission Oil (UTTO) from a Super Tractor Universal Oil (STUO).

Abstract: The present invention provides a boron-free oil soluble lubricant additive package having a succinimide dispersant, an antiwear agent, and an extreme pressure agent, with a total phosphorus content of 500 ppm or less. The lubricating oils of this invention can pass both the ISOT and L60-1 tests, even in the absence of boron.