(Used) 2003 Allison (AT), TRANSMISSION ECM- ECM Model: A61, Serial Number: BK6882A100596091, Part Number: 29556882, Trans Model: HD4060, Serial Number: 6610129516, Part Number: E001536, Voltage: 12V, Pin Plug: 80 Pins, Rectangular Plug, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921