Spicer Front Wheel Hub Spindle Bearing, Vacuum Seal & Small Parts Master Kit for 1999-2004 Ford Super Duty (Dana 50 / 60, Both Sides)

Eliminate harsh front-end rotational grinding, correct excessive outer stub shaft play, and completely rebuild your automatic locking hub vacuum system with this genuine Spicer Front Spindle Bearing, Seal & Small Parts Master Kit. Specially packaged as a comprehensive, dual-side solution for 1999–2004 Ford F-250 and F-350 Super Duty trucks, this master package refreshes the critical internal support bearings and sealing configurations across both front steering knuckles.

On solid-axle Ford platforms, the outer axle stub shafts pass directly through the wheel hub assemblies and rely on small internal needle bearings (spindle bearings) for radial support when the 4WD system is disengaged. Over high mileage, heavy towing, or water submersion, these small needle bearings lose their lubrication, leading to a distinct metal-on-metal squeaking or grinding noise from the front wheel ends. If ignored, a failing spindle bearing will rapidly score the outer stub shaft journal, requiring a costly shaft replacement. At the same time, the massive main knuckle seals and vacuum hub O-rings degrade, causing a vacuum drop that disables your dashboard-controlled Electronic Shift-on-the-Fly (ESOF) automatic locking hubs.

This original equipment manufacturer (OEM) master service package supplies all the mandatory small wear parts and primary seals to overhaul both front wheel stations simultaneously. Sourcing genuine Spicer components guarantees exact factory structural metallurgy, precise roller tolerances, and high-integrity multi-lip rubber compounds engineered to maintain an airtight vacuum environment under intense load shifting.

Kit Contents (Services Both Driver & Passenger Wheel Knuckles):

• (2) Premium Internal Spindle Needle Bearings (Part # B2110)

• (2) High-Integrity Main Outer Axle Shaft to Knuckle Vacuum Seals (Part # 50491 / 2023068)

• (2) Updated Outer Wheel Hub Vacuum O-Rings (Part # 41766 / 701114)

• (2) Front Axle Tube Outer Dust Boot Seals (Part # 50381)

• (2) Axle Shaft Thrust Washer & Snap Ring Small Hardware Packs

Kit Highlights:

• Complete Axle Master Overhaul: Combines internal hub spindle needle bearings, vacuum-actuated face seals, outer dust boots, and mandatory replacement thrust washers/snap rings to rebuild both front wheel stations simultaneously.

• Restores Automatic 4WD Operation: Replaces the critical large-diameter main knuckle seals and face O-rings to secure your vacuum environment, bringing your dashboard 4WD controls back to peak functionality.

• Genuine Spicer OEM Quality: Precision-machined by the vehicle's original equipment axle supplier to guarantee perfect dimensional tolerances and exact matching factory hardness.

• Protects Expensive Stub Shafts: Replacing worn internal needle bearings early prevents them from freezing up and scoring your outer axle stub shafts or destroying the unit bearings.

Vehicle & Axle Fitment:

• Axle Profiles: Open-Knuckle Solid/Monobeam Front Axles: Dana 50 and Dana 60 configurations with vacuum-operated automatic locking hubs.

• Ford Models: 1999, 2000, 2001, 2002, 2003, and 2004 Ford F-250 Super Duty and F-350 Super Duty 4WD trucks, alongside 2000–2005 Ford Excursion 4x4 vehicles.

• Position: Front Steering Knuckle Hub Assembly — Left and Right Sides (1 Kit Overhauls Entire Axle)