Spicer products deliver the same high performance you expect from OE parts. That's because they are OE parts, manufactured to the exact standards that have made us an industry leader for more than a century. Spicer gearing ensures longer axle life andreliable savings see the difference for yourself! Superior quality steel, blended specifically for Spicer gearing. Precision machining that ensures perfect fit between mating gears for extended life and quiet operation. Precise heat-treating that's tightly controlled and verified by micro-hardness testing. Shot-peened to reduce residual stress and avoid cracking, further extending gearing life.