(Used) 2015 Allison (AT), TRANSMISSION ECM - Part Number: 29550689, Serial Number: BK0689A15170222, 28468464 Model: 2500RDS, Engine: Cummins ISB 6.7, Transmission: P-48828, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921