2001 Allison 2000, , Transmission Assys, Fits to: Other Other, (USED) 2002 Allison (AT) 2000series, TRANSMISSON. S/N-6310228545 P/N-E004496 Model-2000series For more information about this item call. We ship Worldwide. 929 W Pulaski Hwy Elkton, MD 21921, Serial# 6310228545, Casting# 6310228545, Truck Year 2001