ASTM D7450 Specification for Performance of Rear Axle Gear Lubricants
ASTM D7450 Standard Specification for Performance of Rear Axle Gear Lubricants Intended for API Category GL-5 Service
4. Performance Classification
4.1 API Category GL-5 - The designation API Category GL-5 is designed to identify the category of lubricants intended for gears, particularly those in automotive axles equipped with hypoid gears, operating under various combination of high-speed/shock-load and low-speed/high-torque conditions. Approved lubricants under the SAE J2360 Standard, the MIL-L-2105C Specification, the MIL-L-2105D Specification, and the MIL-PRF-2105E Specification satisfy the requirements of API Category GL-5. Note that these standards and specifications contain performance requirements that exceed those of API Category GL-5.
5. Performance Requirements
5.1 API Category GL-5 performance requirements for candidate gear lubricants using the most current test methods and procedures are provided in Table 1.
6. Keywords
6.1 axle lubricants; gear lubricants; high-speed/shock-load; hypoid gear lubricants; hypoid gears; low-speed/high-torque
