2006 Allison 3500RDSP, Truck Delivery, Transmission Assys, Fits to: Chevrolet C7500, (Used) 2005 Allison (AT), TRANSMISSION ASSEMBLY- Model: 3500RDSP, Serial Number: 6510594835, Engine: Caterpillar C7, 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# 6510594835, Casting# 6510594835, Truck Year 2006 1GBJ7C1C56F402424