(USED) 1999 Chevrolet C7500 - TANDEM CUTOFF - Make: Eaton. Model: RS404. Ratio: 3.90. Hub Bolts: 10. Brake Type: Air. For more information about this item, give us a call. We ship Worldwide!. (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY. ELKTON, MD 21921.