2017 Allison B400R, City Transit Bus, Transmission Assys, Fits to: New Flyer Xcelsior, (Used) 2016 Allison (AT), TRANSMISSION ASSEMBLY- Model: B400R, Serial Number: 6511481027, Engine: Cummins ISL, 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# 6511481027, Casting# 6511481027, Truck Year 2017 5FYC8FB04HB052124