Spicer Front Outer Axle Shaft Knuckle Seal Kit for Ford Super Duty & Excursion (Dana 50/60, 1999-2004)

Restore your truck's automatic four-wheel-drive system and protect your front-end drivetrain from severe wear with this genuine Spicer Front Outer Axle Shaft Knuckle Seal Kit. Specially bundled for 1999–2004 Ford F-250 Super Duty, F-350 Super Duty, and Excursion models equipped with Dana 50 or Dana 60 front axles, this high-quality service kit contains the essential sealing components required to overhaul a single side of your front axle assembly.

Heavy towing, commercial operations, mud, and road debris place immense stress on your vehicle's front steering knuckles. Over time, the heavy-duty main vacuum seal (often referred to as the knuckle or hub seal) degrades, causing vacuum leaks that prevent your factory automatic Pulse Vacuum Hubs (PVH) from locking into place. This premium kit replaces those worn components with trusted Spicer OEM engineering, ensuring an airtight vacuum lock, protecting your internal needle bearings, and keeping water and trail grit out of your front axle tubes.

Kit Highlights:

• Complete Single-Side Service: Includes the main outer axle shaft-to-knuckle vacuum oil seal alongside matching thrust washers and snap rings required to completely refresh one side.

• Genuine Spicer OEM Quality: Engineered to rigorous factory specifications using high-grade elastomeric compounds to endure extreme temperatures and maximize pure material fatigue life.

• Fixes Common 4WD Failures: Replaces dry, leaking factory knuckle seals to immediately restore proper vacuum pressure for reliable automatic four-wheel-drive hub engagement.

• Direct Application Fit: Mapped precisely for leaf-sprung 1999–2004 Ford Super Duty and Excursion monobeam Dana 50 and Dana 60 front axle configurations.

Vehicle & Axle Fitment:

• Make: Ford

• Models: F-250 Super Duty / F-350 Super Duty / Excursion (4WD Models)

• Years: 1999, 2000, 2001, 2002, 2003, 2004

• Axle Profile: Front Monobeam Dana 50 & Dana 60 (Leaf Spring Front Suspension)

• Position: Front Outer Axle Shaft / Steering Knuckle (Fits Left or Right Side - Sold Individually)