2007 Allison 2500PTS, School Bus, Transmission Assys, Fits to: Freightliner FS65 Chassis, (Used) 2006 Allison, TRANSMISSION ASSEMBLY- Model: 2500PTS, Serial Number: 6310645081, Engine: Mercedes OM906LA, 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# 6310645081, Casting# 6310645081, Truck Year 2007 4UZAAWCS37CX09852