2008 Allison B500, Intercity/Tour Bus, Transmission ECMs, Fits to: MCI D4500, (Used) 2007 Allison (AT), TRANSMISSION ECM- ECM Model: A43, Part Number: 29545324, Serial Number: BK5324N371740E3K, Transmission information- Model: B500, Serial Number: 6610232831, 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# BK5324N371740E3K, Casting# BK5324N371740E3K, Truck Year 2008 1M8PDMFAX8P058227