(Used) 2006 Allison (AT), TRANSMISSION ECM- ECM Model: A41, Serial Number: BK4773N16166E1LR, Part Number: 29544773, Trans Model: 1000RETRAN Serial Number: 9630044848 Part Number: 29544702 Voltage: 12V, Pin Plug: 80 Pins, Rectangular Plug, For more information about this item, give us a call. We ship worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921