OEM front differential for 2001-2010 2500/3500HD trucks. Axle shafts are checked for play and signs of leakage, encoder motor is confirmed functional, and gear oil is inspected for signs of contaminants such as moisture and metal before sale. All differentials have a 3.73 ratio unless otherwise specified. Please specify in the menu if you would like the top differential "ear" cut for use with a lift kit (not needed for a leveling kit) that requires the frame to be cut. Please note that the condition of trucks these are removed from vary so the exact item you receive may be cosmetically different than the one pictured.