| abstract |
PROBLEM TO BE SOLVED: To describe a transmission fluid composition having a relatively low viscosity, a transmission containing the liquid, and a method of driving an automobile using the liquid. The transmission fluid composition includes a lubricating base stock, at least one active sulfur-containing component, and at least one phosphorus-containing component. The active sulfur atom content in the composition is about 0.02% by weight or more, and the ratio of active sulfur atoms to phosphorus atoms in the composition is about 5 or more. The viscosity at 100 ° C. of the composition is from about 4 centistokes to less than about 7 centistokes. [Selection figure] None |