2001 Allison 1000 SERIES, Truck Delivery, Transmission Assys, Fits to: Freightliner MT55 Chassis, (Used) 2000 Allison, TRANSMISSION ASSEMBLY- Model: 1000Series, Serial Number: 6310062406, Part Number: E004506, 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# 6310062406, Casting# 6310062406, Truck Year 2001 4uzaa5bw31cj04543