Spicer Front Outer Axle Stub Shaft U-Joint, Vacuum Knuckle & Tube Seal Master Overhaul Kit for 1998-2004 Ford Super Duty (Dana 50 / 60, Both Sides)

Eliminate harsh front-end driveline vibrations, restore your automatic four-wheel-drive engagement, and completely rebuild your outer wheel ends with this genuine Spicer Dana 50/60 Master Overhaul Kit. Specifically packaged as an all-in-one, dual-side restoration solution for 1998–2004 Ford F-250 and F-350 Super Duty 4x4 trucks and 2000–2005 Ford Excursion models, this premium master package includes all the primary rotating hardware and multi-lip seals required to refresh both the driver and passenger sides of your front axle at the same time.

On leaf-spring Ford Super Duty platforms, the front solid axle undergoes incredible operational strain under the immense weight of the 7.3L or 6.0L PowerStroke Turbo Diesel engines—compounded by commercial plowing, heavy towing, or large off-road tires. Over high mileage, the front axle shaft universal joints naturally dry out, flat-spot, or suffer water intrusion. Dry or binding U-joints cause severe steering wheel feedback, tire scrubbing, accelerated hub unit bearing wear, and can eventually snap entirely. Furthermore, the massive primary knuckle vacuum seals integrated into this assembly often dry-rot or tear over time. When these blow out, your Electronic Shift-on-the-Fly (ESOF) system loses vacuum pressure, leaving your dashboard-controlled automatic 4WD completely inoperable.

This original equipment manufacturer (OEM) master overhaul package eliminates the hassle of tracking down individual parts by combining premium Spicer Life Series (SPL) or heavy-duty greaseable universal joints with the factory-correct primary vacuum knuckle seals and updated outer axle tube dust seals. The included dust seals press into the ends of the housing tubes to block water, road salt, and grit from migrating down the tubes toward your inner differential. Sourcing a genuine Spicer master bundle ensures exact original equipment tolerances, uncompromised metallurgy, and matching factory blueprints for a seamless, long-lasting repair.

Kit Contents (Services Both Left & Right Front Steering Knuckle Wheel Ends):

• (2) Heavy-Duty Front Axle Shaft Universal Joints with Premium Needle Bearings

• (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)

• Full Set of Internal/External Retaining Snap Rings and Seals

Kit Highlights:

• Complete Dual-Side Master Set: Supplies exactly enough factory-correct hardware and specialized seals to fully overhaul both the left and right front outer wheel ends simultaneously.

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

• Heavy-Duty Solid-Cross U-Joints: Features cold-forged universal joints engineered with advanced thrust washers and tight seals to withstand immense torsional leverage and high thermal loads.

• Genuine Spicer OEM Quality: Precision-machined and induction-hardened by the vehicle's original axle supplier to guarantee strict structural compliance and perfect alignment with your factory inner axle shafts and 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 End — Left (Driver) and Right (Passenger) Sides (1 Kit Overhauls Entire Front Axle)