1992 Mack DM688S, Truck Delivery, Coolant Reservoir, Fits to: Mack DM688S, (Used) 1992 Mack DM688S, COOLANT RESERVOIR- Part Make: Allison Transmission, Material: Steel, Reference images for condition. For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Truck Year 1992, VIN 1M2B218C6NM002581, Part Make Allison Transmission 1M2B218C6NM002581