2004 Allison HD4560P, Truck Delivery, Automatic Shifter Assys, Fits to: Mack MR688S, (Used) 2003 Allison, AUTOMATIC SHIFTER ASSEMBLY- Serial Number: 0801410, Part Number: 29538360, Make: Allison, Type: Automatic, Transmission: Allison HD4560P, 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, Serial# 0801410, Casting# 0801410, Truck Year 2004 1M2K189C34M023557