Demand genuine Spicer. Dana design, engineering, testing and manufacturing processes all work in conjunction with one another to ensure unparalleled performance that non-genuine parts simply cannot deliver. Spicer gearing offers the easiest possible set-up, a quieter ride and strength that cannot be beaten. All gears go through a rigorous production to ensure quality. Statistically controlled heat treatment optimal hardness. Three axis face hobbing reduces noise, vibration and harshness while delivering the smoothest possible ride. Shot Peening doubles fatigue life by shooting micro beads at the root of the tooth. Gears are luberized by adding a chemical finish to remove the break in period other aftermarket gears require.