(Used) 2000 Allison (AT), TRANSMISSION ECM- ECM Model: 5421-L, Part Number: 29537441, Serial number: 86DYFM302303789, CIN: 1200060C010N, Volts: 12, Transmission Model: 1000Reman, Stock #P-63520 2 Rectangular Plugs with 32 Pins, 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