View 6 Photos View 0 Videos Detroit RT40-4 Rear Axle Assembly for a 2019 Freightliner Cascadia 125 Newly Listed Contact for price (Used) 2019 Freightliner Cascadia 125, COMPLETE REAR REAR TANDEM- Part Number: C11-00042-090, Serial Number: 771198B0039021, Make: Detroit, Model: RT40-4, Ratio: 3.42, Capacity: 20,000 Lbs,... ConditionUsedRear End3.42 ratioFits To Make(s)FreightlinerFits To Model(s)Cascadia 125Will Fit Year(s)2019Part NumberC11-00042-090Stock NumberP-503559 MLS Number14426549CategoryAxle Assemblies, Rear Last Updated6/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info