2001 Allison 1000 SERIES, Truck Delivery, Transmission Assys, Fits to: Freightliner MT55 Chassis, (Used) 2000 Allison, TRANSMISSION ASSEMBLY- Model: 1000 RETRAN, Serial Number: 9630008977, 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# 9630008977, Casting# 9630008977, Truck Year 2001 4UZAA5BW31CJ04560