2004 Allison MD3060, SCHOOL BUS, Transmission Assys, Fits to: Thomas Built Saf-T-Liner MVP-EF, Used 2003 Thomas Built, AT Allison TRANSMISSIONS ASSEMBLY- Model: MD3060 Serial Number: 6510447640 Engine: Caterpillar 3126 w/230hp For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Serial# 6510447640, Casting# 6510447640, Truck Year 2004 1T88U6C2X41144077