Automotive Gear Oil Performance Testing
As lubricant formulations change to meet higher performance standards, Southwest Research Institute (SwRI) continues to provide testing and evaluation services to meet industry needs for current specifications and new test method development.
The Institute performs required bench and performance tests to qualify automotive gear lubricants under the military MIL-PRF-2105E specification and the ASTM D 5760 MT-1 specification. In addition, SwRI conducts tests in support of vehicle manufacturers and component suppliers specifications such as Mack Trucks Inc. and the Eaton Corporation. SwRI frequently performs custom programs, tailored to a client's individual needs.
SwRI conducts a variety of fleet and laboratory procedures for new product research and development. These services, including gear and gear oil evaluations, can be adapted for various research requirements.
Ford VT-20, Trailer Tow Axle Oil Evaluation: SwRI breaks in a passenger car equipped with a nine-inch ring gear and 3.25-ratio rear axle. After 1,000 miles (1,610 km), a trailer is attached to the car and towed at 70 mph (113 km/h) with a 400-pound (1,779N) pull at the hitch until the axle oil temperature stabilizes or the axle fails.
GM Big Wheel/Little Wheel Oil Evaluation: The Institute evaluates the special properties of limited-slip differential oils. Vehicles equipped with limited-slip differentials are operated with different size tires on each side of the drive axle. Axle noise, feel, and bias retention are periodically evaluated.
Truck Axle Oil Fuel Economy Evaluation: SwRI evaluates the fuel economy associated with axle oils in heavy-duty trucks using SAE and TMC procedures. Precision fuel consumption equipment measures precise speed, time, and distance controls during these road tests.
Evaluation of Gear Test Parts: Trained SwRI personnel rate test parts at the Institute or in the field. The Institute also offers training in gear surface distress evaluation.This brochure was published in November 1999. For more information about automotive gear oil performance testing, contact Michael Lochte, director, Fuels and Driveline Lubricants Research Department, Fuels and Lubricants Research Division, Southwest Research Institute, P.O. Drawer 28510, San Antonio, Texas 78228-0510, Phone (210) 522-5430, Fax (210) 680-7523.