2008 Allison 2500PTS, School Bus, Transmission Assys, Fits to: Thomas Built Saf-T-Liner HDX, (Used) 2007 Allison, TRANSMISSION ASSEMBLY- Model: 2500 PTS, Serial Number: 6310785214, Engine: Mercedes OM 906 LA, 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# 6310785214, Casting# 6310785214, Truck Year 2008 1T7YN4A2481102163