1988-1998 AXLE IDENTIFICATION F450 DANA 80R
Dana 80 Dual Rear Wheel Rear Axles in 1988-1991 Ford F-350, 1992-1998 F-450 Super Duty trucks, 1996-1999 E-350, and 1999-2000 E-450 van chassis have a Bill of Material Number (BOM) stamped on a Build Tag (red arrow) attached to the differential by two of the differential cover bolts (yellow arrows).