(Used) 2003 Allison, TRANSMISSION ASSEMBLY- Model: 2000 RETRAN, Serial Number: 9730029390, Part Number: 29544743, Reference Number: 19025, Engine: Mercedes OM906LA, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921