USA Standard Ring & Pinion gear set for Ford 10.25" in a 3.55 ratio. USA Standard ring & pinion sets are the right choice when price is a factor and quality is essential. USA Standard Gear offers a full line of ring & pinion sets for a variety of common & hard to find applications. This is a short spline pinion for '92 & older applications. USA standard gear offers a lower cost alternative to other manufacturers when price must be kept low. USA standard gears are not recommended for quiet running vehicles. USA standard gear offers a standard one year warranty against defects on their ring & pinion sets. This gear is designed for 92 & older trucks only. When installing this gear set in a 99 & newer 10.5" housing you will need a 10.25" bearing kit.