(Used) 2007 Allison (AT), TRANSMISSION ECM- Model: A41, Serial Number: BK5322N17022R38M, Part Number: 29545322, Trans Model: 2100-2200HS, Serial Number: TMG039800-1 Part Number: 29547943 Type Plug: Rectangular, Pin Plug: 80 Pins, For more information about this item, give us a call. We ship worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921