2010 Allison 2200HS, Truck Delivery, Transmission ECMs, Fits to: Freightliner MT55 Chassis, (Used) 2009 Allison (AT), TRANSMISSION ECM- ECM Model: A51, Part Number: 29545536, Serial Number: BK5536N1003401E8, Transmission information- Model: 2200HS, Serial Number: 6310985346, 1 Rectangular Plug with 80 Pins, 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, Serial# BK5536N1003401E8, Casting# BK5536N1003401E8, Truck Year 2010 4UZAARDU8acas6122