GB/T 35472.6-2017 standard is the sixth part of the wet automatic transmission friction element test, which mainly describes the test method for the relationship between friction performance and pressure, speed and temperature. The standard is suitable for the performance evaluation of various types of wet automatic transmission friction elements. By simulating the friction test under different working conditions, the relationship between the friction performance and the operating parameters is analyzed. The standard provides a standardized method for gearbox manufacturers and R & D personnel to evaluate the performance of components.