(Used) 2011 Allison (AT), TRANSMISSION ECM- ECM Model: A51, Part Number: 29545536, Serial Number: BK5536N111800202, 12 Volts A5100QPN, CIN: 4C00QPN002K, Transmission Model: 1000HS, Plug Pins: 80 Pins Plug Rectangular, Reference images for condition. ,