The Dana 10458743 Inner Gear Kit is a differential carrier gear kit listed for the Dana Super 60 / M256. Inner gear kits of this type supply the gearing that works inside the carrier case, usually the differential gears, side gears, cross shaft and thrust washers, so the set can be renewed together during a differential rebuild rather than one gear at a time. Matching the kit to the axle it came from matters, since the gears have to mesh as a set. This is a genuine Dana part from Pro Gear and Transmission. Call us to confirm proper fit for your application before you order.FeaturesDana inner gear kit, part number 10458743Differential carrier gear kit for the Dana Super 60 / M256Supplies the gearing that sits inside the differential carrier caseSet is renewed together during a differential rebuildA genuine Dana part from Pro Gear and Transmission