View 6 Photos View 0 Videos Mack Granite GU813 Front Axle Assembly for a 2017 Mack GU813 Contact for price (Used) 2017 Mack GU813, COMPLETE FRONT AXLE- Part Number: 21881777 / 21881778, Serial Number: TBD, Center Leaf to Center Leaf: 32.5", Make: Mack, Model: 21881777, Capacity: 20,000 Lbs, Hub... ConditionUsedFits To Make(s)MackFits To Model(s)GU813Will Fit Year(s)2017Capacity20,000 LbsPart Number21881777 / 21881778Stock NumberP-493899 MLS Number14085640CategoryAxle Assemblies, Front Last Updated1/22/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info