(Used) 2011 Allison (AT), TRANSMISSION ECM- ECM Model: A51, Part Number: 29545536, Serial Number: BK5536N111290804, A5100QPN, CIN: 4C00QPN002K, 12 Volts, Transmission Model: 1000HS, 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