0 Allison 1000HS, , Transmission Assys, Fits to: , (Used) Allison (AT), TRANSMISSION ASSEMBLY- Model: 1000HS, Serial Number: 6310662431 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# 6310662431, Casting# 6310662431,