2001 Allison 1000 SERIES, Truck Delivery, Transmission Assys, Fits to: Freightliner MT55 Chassis, (Used) 2001 Allison, TRANSMISSION ASSEMBLY- Model: 1000, Serial Number: 6310561696, 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# 6310561696, Casting# 6310561696, Truck Year 2001 4uzaa5bwx1cj04992