Engines | Mounts, , 2004 ALLISON WT3ECU911A, Engine ECM, (GOOD USED) ALLISON 4500RDS TRANSMISSION TCM PART # 29541227, MODEL NO WT3ECU911A, S/N 1A323666, BASE TCM P/N 29541227, SERIAL # 1A323666, ALLISON TRANSMISSION MODEL 4500RDS, CIN 0F00GQP004E, CUSTOMER P/N 180MS517M26, STOCK # ECM0170