2007 Meritor/Rockwell RT40-145, Truck Tractor, Tandem Cutoffs, Fits to: Freightliner COLUMBIA 120, (USED) 2007 Freightliner Columbia 120 - Tandem Cutoff - Make: Meritor. FRONT DIFF SOLD Model: RT-40-145 R-SRS Serial Number: FOR00049269. Hub Bolts: 10. Brake Type: Air Wedge. For more information about this item, give us a call. We ship Worldwide!. (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY. ELKTON, MD 21921., Ratio 3.58, Serial# FOR00049269, Casting# FOR00049269 1FUJA6AV27LX29388