(Used) 2011 Allison (AT) (Reman), TRANSMISSION ASSEMBLY- Model: 2000 RETRAN, Serial Number: 9730032476, Part number: 29550042, Engine: Cummins ISB 6.7, Reference images for condition. For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921