(Used) 2007 Allison, TRANSMISSION ECM- Part Number: A40004U0, Serial Number: 45004U00018, Model Number: 2100-2200HS, Serial Number: BK5321N07149Z8E5, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921