(Used) 2020 Allison, TRANSMISSION ECM- Model: 2500RDS, Part Number: 29556882, Serial Number: B18300037D37N, Trans Serial Number: 6311695747, Engine: Cummins ISB6.7, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921