1994 Allison MT643, Truck Delivery, Transmission Assys, Fits to: GMC C7000 Topkick, (Used) 1993 Allison (AT), TRANSMISSION ASSEMBLY- Model: MT643, Serial Number: 2410490162, Part Number: 15688675, Engine: Caterpillar 3116, 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# 2410490162, Casting# 2410490162, Truck Year 1994 1GDM7H1J7RJ507015