2014 Allison 2500PTS, School Bus, Transmission Assys, Fits to: Blue Bird BB Conventional, (Used) 2013 Alison (AT), TRANSMISSION ASSEMBLY- Model: 2500PTS, Serial Number: 6311201395, 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# 6311201395, Casting# 6311201395, Truck Year 2014 1BAKFCPH9EF303815