(Used) 2007 Allison (AT) (Reman), TRANSMISSION ASSEMBLY- Model: HD4500P, Serial Number: 9430011692, Part Number: 29544893, Engine: Mack MP7, For more information about this item, give us a call.We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921