Improved anti-shudder performance of ATFs-Influence of a new friction modifier and surface chemistry

► Friction performance of the baseline package ATFs was reported. ► Amide friction modifier was found to be very good for anti-shudder performance. ► Detailed tribochemistry study was carried out based on surface analysis results. ► Some surface functional groups (-OH, -CNO) were proposed to be beneficial to ATF. ► Friction modifier was linked with some surface functional group adsorptions.