2012 Allison 3500RDSP, Truck Delivery, Transmission Assys, Fits to: International DuraStar 4300, (Used) 2011 Allison (AT), TRANSMISSION ASSEMBLY- Model: 3500RDSP, Serial Number: 6511013273, Engine: International DT466, 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# 6511013273, Casting# 6511013273, Truck Year 2012 1HTMMAAN3CH583548