2012 Allison 2500PTS, , Transmission Assys, Fits to: Freightliner B2, (Used) 2011 Allison (AT), TRANSMISSION ASSEMBLY- Model: 2500PTS, Serial Number: 6311045078, Engine: Cummins ISB6.7, 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# 6311045078, Casting# 6311045078, Truck Year 2012