2001 Allison 1000 SERIES, Truck Delivery, Transmission Assys, Fits to: Freightliner MT55 Chassis, (USED) AT Allison 1000 SERIES, TRANSMISSION ASSEMBLY- Model: 1000 SERIES Serial: N/A Engine: 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# N/A, Casting# N/A, Truck Year 2001 4UZAA5BW11CH97955