Spicer Front Outer Axle Stub Shafts & Master Wheel End Seal Kit for 1998-2004 Ford Super Duty (Dana 50 / 60, Both Sides)

Restore reliable front-wheel torque delivery, eliminate outer axle play, and protect your front drivetrain from harsh road debris with this genuine Spicer Front Outer Axle Shaft & Master Seal Overhaul Kit. Packaged specifically as a comprehensive, dual-side maintenance solution for 1998–2004 Ford F-250 and F-350 Super Duty 4x4 trucks and 2000–2005 Ford Excursion models, this premium hardware master bundle includes the precision-machined rotating components and multi-lip seals required to refresh both the driver and passenger sides of your leaf-spring solid front axle simultaneously.

On classic Ford Super Duty platforms, the front outer axle stub shafts bear immense torsional stress while navigating tight turns and transferring raw torque under the weight of heavy 7.3L or 6.0L PowerStroke Turbo Diesel engines. Over high mileage or heavy off-road use, the factory shaft splines can twist, pit, or develop deep grooves where the primary vacuum seal rides. This wear leads to severe wheel end play, ruined hub bearing assemblies, and immediate vacuum loss. When vacuum integrity drops, your vehicle's Electronic Shift-on-the-Fly (ESOF) system fails to engage the automatic locking hubs from the dash, dropping you out of 4WD traction exactly when you need it most.

This original equipment manufacturer (OEM) master service package eliminates the hassle of hunting down individual components by bundling a pair of premium, induction-hardened Spicer outer stub shafts with factory-correct primary vacuum knuckle seals, support needle bearings, thrust washers, and updated outer axle tube dust seals. The included dust seals press into the outer edges of the axle housing tubes, preventing water, mud, and road salt from migrating down toward your inner differential seals. Sourcing a genuine Spicer master bundle ensures uncompromised metallurgy, exact factory tolerances, and matching original blueprints for a seamless, heavy-duty repair.

Kit Contents (Complete Overhaul for Both Driver & Passenger Wheel Ends):

• (2) Genuine Spicer Heavy-Duty Front Outer Axle Stub Shafts (30-Spline)

• (2) Premium Multi-Lip Outer Axle Stub Shaft Vacuum Knuckle Seals (Part # 50491 / F81Z-3254-CB)

• (2) Updated Multi-Lip Outer Axle Tube Dust Seals (Part # 50381 / F81Z-1S175-HCA)

• (2) Inner Knuckle Hub O-Rings

• (2) Spindle Support Needle Bearings & Thrust Washer Hardware Sets

• (2) Axle Stub Shaft Snap Rings

Kit Highlights:

• Complete Dual-Side Restoration: Supplies exactly enough factory-correct outer stub shafts, heavy-duty bearings, and specialized multi-lip seals to fully overhaul both the left and right front outer axle assemblies at the same time.

• Restores ESOF 4x4 Function: Features fresh, original equipment vacuum seals to eliminate vacuum drop-off, ensuring your automatic locking hubs engage instantly when you switch into 4WD.

• Induction-Hardened Metallurgy: The premium Spicer stub shafts are precision-machined from high-grade alloy steel and heat-treated to exact case-hardness depths for exceptional structural durability under high load.

• Genuine Spicer OEM Quality: Precision-engineered by the vehicle's original axle supplier to guarantee strict compliance with factory dimensions and seamless integration with your existing inner axle shafts and wheel hub units.

Vehicle & Axle Fitment:

• Axle Profiles: Solid Monobeam / Leaf-Spring Front Dana 50 and Dana 60 Axles equipped with open knuckles and vacuum-operated or manual locking hubs. Does not fit later 2005+ coil-spring Dana Super 60 axle configurations.

• Ford F-250 Super Duty: 1998, 1999, 2000, 2001, 2002, 2003, and 2004 4x4 truck models.

• Ford F-350 Super Duty: 1998–2004 Single-Rear-Wheel (SRW) and Dual-Rear-Wheel (DRW) dually 4x4 models.

• Ford Excursion: 2000, 2001, 2002, 2003, 2004, and 2005 4x4 SUV configurations.

• Position: Front Outer Axle Wheel Ends — Left (Driver) and Right (Passenger) Sides (1 Kit Completely Services the Entire Front Axle).