2011 Allison 3000PTS, School Bus, Transmission Assys, Fits to: Thomas Built Saf-T-Liner HDX, (Used) 2010 Allison (AT), TRANSMISSION ASSEMBLY- Model: 3000PTS, Serial Number: 6510900662, 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# 6510900662, Casting# 6510900662, Truck Year 2011 1T7YU4E26B1131023