2001 Allison 1000HS, Truck , Transmission Assys, Fits to: Freightliner MT55 Chassis, (Used) 2000 Allison (AT), TRANSMISSION ASSEMBLY- Model: 1000HS Serial Number: 6310657207 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# 6310657207, Casting# 6310657207, Truck Year 2001 4UZAA5BW11CJ04542