2009 Allison B500, Intercity/Tour Bus, Transmission ECMs, Fits to: MCI D4500, (Used) 2006 Allison B500, TRANSMISION ECM- Model Number: WT3ECU912, Serial Number: 20092102, Part Number: 29543300, Transmission information- Model: B500, Serial Number: 6610194329, 3 Rectangular Plug with 32 Pins each, 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# 20092102, Casting# 20092102, Truck Year 2009 1M8PDMDA89P057257