23 DRIVE AXLES FOR VEHICLES-NAMELY, MOTOR TRUCKS; VEHICLE DRIVE AXLE PARTS-NAMELY, SHAFTS, DIFFERENTIALS AND HOUSINGS, AIR AND ELECTRIC SHIFT CONTROLS FOR VEHICLE DRIVE AXLES, INTERNAL COMBUSTION ENGINES AND PARTS THEREOF, MARINE DRIVES AND PARTS THEREOF, AND VALVE SPRINGS FOR INTERNAL COMBUSTION ENGINES, VALVE LIFTERS AND VALVES