View 8 Photos View 0 Videos 2016 Mack MRU633 Front Axle Assembly Newly Listed Contact for price (Used) 2016 Mack MRU633, COMPLETE FRONT AXLE- Part Number: 21881774, 21895907, Center Leaf to Center Leaf: 33", Make: Mack, Model: FXL 20, Capacity: 20,000 Lbs, Hub Bolts: 10, Brake Type:... ConditionUsedFits To Make(s)MackFits To Model(s)MRU633Will Fit Year(s)2016Capacity20,000 LbsPart Number21881774Stock NumberP-509905 MLS Number14509782CategoryAxle Assemblies, Front Last Updated7/28/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info