Spicer employs a battery of statistically controlled processes throughout the manufacturing of Spicer parts, from heat treatment that delivers optimal hardness to face hobbing for ideal accuracy of gear tooth spacing to shot peening that helps to ensure maximum strength and life. Spicer gearing is engineered to meet the specific Original Equipment standards of Dana, so you get a perfect fit with less noise, vibration and harshness. With Spicer gearing, you get a longer life from your ring and pinion.