(Used) 2007 Allison (AT), TRANSMISSION ECM- ECM Model: A40, Part Number: 29545321, Serial Number: BK5321N072021AT3, A4004U0, CID: 45004U00018, 12 Volts, Transmission Model: 2200HS, Plug Pins: 80 Pins Plug Rectangular, 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