(Used) 2009 Allison, TRANSMISSION ECM- Serial Number: BK5536N10078026C, Part Number: 29545536, ECM Model: A51, A5100MSV, CIN 4C00MSV003T, Trans Model: 2500PTS, Engine: Cummins ISB 6.7, Transmission: P-43305, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921