AUTOMATIC TRANSMISSION OIL COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain an automatic transmission oil composition having a performance giving a long life of shudder prevention in a slip lockup apparatus and a performance giving a long life of scratch noise prevention in a belt-type CVT apparatus. SOLUTION: This automatic transmission oil composition is obtained by compounding a base oil with (A) a Ca-sulfonate having a total base value of 50-100 mgKOH/g and (B) a phosphite. Further, the composition is compounded with at least one kind of a friction conditioner selected from (C) a sarcosine derivative and (D) a reaction product of a carboxylic acid with an amine. The base oil may contain a viscosity index improver.