2017 Detroit RT40-4N, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Freightliner Cascadia 125, (Used) 2017 Freightliner Cascadia 125, REAR DIFFERENTIAL GEARS ONLY- Part Number: C11-00042-045, Serial Number: 771AAC-A203778I, Make: Detroit, Model: RT40-4N, Ratio: 2.53, Capacity: 20,000 Lbs, 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 2.53, Serial# 771AAC-A203778I, Casting# 771AAC-A203778I 1FUJGLDR4HLHX1674