2000 Mack CRD113, Truck Delivery, Rear Rears (Tandem Rear or Single), Fits to: Mack RD688SX, (Used) 2000 Mack RD688SX, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Make: Mack, Front Axles: CRD113, Ratio: 4.64 Hub Bolts: 6 Brake Type: Drum, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Ratio 4.64, Truck Year 2000, VIN 1M2P268C2YM052319 1M2P268C2YM052319