(Used) Allison, TRANSMISSION ASSEMBLY- Model: FROF-15210C, Serial Number: K0552579, Part Number: TA-D57-043789, OEM Number: 3508068C91, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921