(Used) 2004 Allison (AT), TRANSMISSION ECM- ECM Model: 5421-L, Part Number: 29542725, Serial Number: BKDYPSM142212SUT, CIN: 1B001Q00014, 12 Volts, 10R-020284, Transmission Model: 2000, 2 Rectangular Plug with 32 Pins each, Reference images for condition. For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921