2006 Allison B500, Intercity/Tour Bus, Transmission Assys, Fits to: MCI D4500, (Used) 2005 Allison (AT) TRANSMISSION ASSEMBLY- Model: B500, Serial Number: 6610093242, Part Number: E004469,02A04, Engine: Caterpillar C12, 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# 6610093242, Casting# 6610093242, Truck Year 2006 1M8PDMDA96P057179