2010 Allison 2500PTS, School Bus, Transmission Assys, Fits to: Freightliner B2, (Used) 2009 Allison, TRANSMISSION ASSEMBLY- Model: 2500PTS Serial Number: 6310937384 Engine Model: MBE 926 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# 6310937384, Casting# 6310937384, Truck Year 2010 4UZABRDK4ACAN5421