2012 Allison 2500PTS, School Bus, Transmission Assys, Fits to: Freightliner B2, (Used) 2011 Allison (AT), TRANSMISSON ASSEMBLY- Model: 2500PTS Serial Number 6311044340 Engine: Cummins ISB 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# 6311044340, Casting# 6311044340, Truck Year 2012 4UZABRDU8CCBH0152