2017 Allison 2500PTS, School Bus, Transmission Assys, Fits to: Freightliner B2, (Used) 2016 Allison, TRANSMISSION ASSEMBLY- Model: 2500PTS, Serial Number: 6311451293, Engine: Cummins ISB 6.7, 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# 6311451293, Truck Year 2017, VIN 4UZABRDT1HCHV7909 4UZABRDT1HCHV7909