Spicer Front Outer Axle Stub Shaft & Wheel End Seal Kit for 1998-2004 Ford Super Duty (Dana 50 / 60, Single Side)

Restore reliable front-wheel torque delivery, eliminate outer axle play, and lock out harsh road debris with this genuine Spicer Front Outer Axle Shaft & Seal Overhaul Kit. Packaged specifically as a focused, single-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 bundle includes the precision-machined rotating components and multi-lip seals required to refresh either the driver or passenger side of your leaf-spring solid front axle.

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 damage leads to severe wheel end play, ruined hub bearing assemblies, and immediate vacuum loss. When the 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) service package eliminates the hassle of hunting down individual components by pairing a premium, induction-hardened Spicer outer stub shaft with the factory-correct primary vacuum knuckle seal and an updated outer axle tube dust seal. The included dust seal presses into the outer edge of the axle housing tube, preventing water, mud, and road salt from migrating down toward your inner differential seals. Sourcing a genuine Spicer service bundle ensures uncompromised metallurgy, exact factory tolerances, and matching original blueprints for a seamless, heavy-duty repair.

Kit Contents (Services One Front Steering Knuckle Wheel End):

• (1) Genuine Spicer Heavy-Duty Front Outer Axle Stub Shaft (30-Spline)

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

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

• (1) Needle Bearing & Thrust Washer Set for Stub Shaft Support

Kit Highlights:

• Focused Single-Side Solution: Provides exactly enough factory-correct hardware and specialized seals to fully overhaul either the left or right front outer axle shaft assembly without paying for parts you don't need.

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

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

• 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 shaft and wheel hub unit.

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 End — Left (Driver) or Right (Passenger) Side (Note: Two kits required if overhauling both sides of the vehicle).