2013 Axle Alliance RT40-4N, Truck Tractor, Tandem Cutoffs, Fits to: Freightliner Cascadia 125, (USED) 2013 Freightliner Cascadia 125 - TANDEM CUTOFF - Make: Detroit. Model: RT40-4N Serial Number: 771AAC-A088789T. Hub Bolts: 10. Ratio: 3.42. 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 3.42, Serial# 771AAC-A088789T, Casting# 771AAC-A088789T 1FUJGLDR8DSBU3892