2015 Allison 2100RDS, Truck Delivery, Transmission Assys, Fits to: International DuraStar 4300, (Used) 2014 Allison (AT), TRANSMISSION ASSEMBLY- Model: 2100RDS, Serial Number: 6311314964, Engine: Cummins 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# 6311314964, Casting# 6311314964, Truck Year 2015 1HTMMMML1FH554324