Engines | Mounts, , 2012 ALLISON 4500RDS, Engine ECM, (GOOD USED) 2012 ALLISON 4500RDS TCM PART # 29545538 FOR SALE, MODEL A53, ASSY # A520043N, CIN 4F0043N007B, 10R022849, ATA 5301, 032849, TCM S/N BK5538N3217502D8, STOCK # 3121 | TESTED & INSPECTED!