Dana Spicer 10078359 is a shim kit for off-highway axle applications, a genuine Dana Spicer part from Pro Gear and Transmission. Shims are thin metal spacers, and their thickness sets how gears and bearings sit against each other, which controls bearing preload and gear clearance. When the shimming is off, gears mesh poorly and the usual result is whine, extra wear and eventually bearing damage. This kit is sold each. Not sure it matches your axle? Call us and we will help you confirm fit for your application.FeaturesGenuine Dana Spicer partPart number 10078359Shim kit for off-highway axle applicationsShim thickness sets bearing preload and gear clearanceSold each