Expedition. Navigator. A separate Housing extension mounted to the sides of the differential Housing which houses the right and left Axle shafts. Differential Vent Hose. For Intermediate Shaft. The Housing of a differential that holds the gears, pinions, differential case, etc. beam. Breather. DIFFERENTIAL carrier. Drive Shaft. Vent Hose. Vent valve. Included with: Differential carrier Part has related components that cannot be reused/reinstalled; bearing and seal.