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A method and equipment for the determination of material limits for polymeric thrust elements is presented along with initial data based on the system. Methods are presented to better simulate drive train thrust element operation on equipment that utilizes production ready mating components under actual load, speed, and lubrication conditions. Initial results for limited materials are presented. This study allows for a more complete understanding of the effects of the product of pressure and velocity (PV) on material wear and frictional behavior for drive train applications of thrust elements.

The sensitivity of a rotary seal ring to transmission manufacturing operations and assembly techniques can effect the overall quality of an automatic transmission. In addition to those characteristics that make a seal functional in an automatic transmission there are other characteristics that facilitate the ease and simplicity of assembly in commercial manufacture. A combination of material properties, design, and manufacturing techniques combine to make thermoset polyimide seal rings an attractive alternative to other materials now in use.