Friction modifier for automatic transmission fluid

A method of improving anti-shudder performance, comprising:

• lubricating a transmission with a lubricating oil composition, the lubricating oil composition including:
• (a) a major amount of an oil of lubricating viscosity;
• (b) one or more ashless dispersants;
• (c) at least one phosphorus-containing anti-wear additive, wherein the at least one phosphorus-containing anti-wear additive is phosphorous-containing acid, phosphate ester, phosphite ester, thiophosphate ester, or amine salt thereof;
• (d) at least one friction modifier, wherein the at least one friction modifier is a diol, ethoxylated amine, fatty acid ester, or alcohol;
• (e) a nitrogen-containing friction modifier with the following structure,
• wherein R1 and R2 are independently branched C10-C25 hydrocarbyl groups.