2001 Allison 1000 SERIES, Truck Delivery, Transmission Assys, Fits to: Freightliner MT55 Chassis, (Used) 2001 Allison, TRANSMISSION ASSEMBLY- Model: 1000, Serial Number: 6310613764, Part Number: E004506, Engine: Cummins ISB, 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# 6310613764, Casting# 6310613764, Truck Year 2001 4UZAA5BWX1CJ04538