(Used) 2003 Allison (AT) TRANSMISSION ASSEMBLY- Model: 1000, Serial Number: 6310334499, Part Number: E008983, Engine: GmChev 6.6L, For more information about this item, give us a call. We ship worldwide! ( CRG HEAVY TRUCK PARTS ) 929 W PULASKI HWY, ELKTON, MD 21921