2001 Allison 1000 SERIES, TRUCK DELIVERY, Transmission Assys, Fits to: Freightliner MT55 Chassis, (USED) 2000 Allison (AT), TRANSMISSION ASSEMBLY- Serial Number: 631007206 Part Number: E004506 Model-1000 series Engine Model: 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# 631007206, Casting# 631007206, Truck Year 2001 4UZAA5BW11CJ04699