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

Eliminate harsh front-end driveline vibrations, restore your automatic four-wheel-drive engagement, and completely protect your front wheel ends from destructive trail debris with this genuine Spicer Front Axle Seal & U-Joint Master Overhaul Kit. Specifically packaged 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 master package includes all the primary rotating components 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 Dana 60 axle endures incredible structural and rotational strain under the immense weight of 7.3L or 6.0L PowerStroke Turbo Diesel engines. Over time, the front axle shaft universal joints naturally dry out, flat-spot, or suffer moisture intrusion from deep water crossings. Binding or dry U-joints cause severe steering wheel feedback, tire scrubbing, and accelerated hub unit bearing wear—and left unchecked, they can snap entirely, taking out your expensive inner and outer axle shafts. Simultaneously, the massive primary knuckle vacuum seals integrated into this assembly can dry-rot or tear. When these fail, your Electronic Shift-on-the-Fly (ESOF) system loses vacuum pressure, instantly disabling your dashboard-controlled automatic 4WD.

This original equipment manufacturer (OEM) master service package eliminates the hassle of sourcing individual components by pairing two premium heavy-duty Spicer 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 mud from migrating down the tubes toward your inner differential seals. 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 fresh set of 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/outer axle shafts and hub units.

Vehicle & Axle Fitment:

• Axle Profile: Solid Monobeam / Leaf-Spring Front Dana 60 Axles equipped with open knuckles and vacuum-operated or manual locking hubs. Does not fit lighter-duty Dana 50 front axles or 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 factory-equipped with the optional Dana 60 front axle upgrade.

• Ford F-350 Super Duty: All 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 equipped with the Dana 60 front platform.

• Position: Front Outer Axle Wheel End — Left (Driver) and Right (Passenger) Sides (1 Kit Overhauls Entire Front Axle)