Front 4-Piece Drivetrain Kit for 2003-2006 Expedition Navigator

In this review of the Front 4-Piece Drivetrain Kit we look at whether this direct-fit replacement is a sensible choice for owners of 2003-2006 Ford Expedition and Lincoln Navigator 4WD models. The bottom line: this kit is best for DIY mechanics and independent shops who want a matched set of front CV axle assemblies and wheel hub bearing assemblies to restore steering feel and front-end function without machining or modifying original mounting points. It earns recommendation for its fit, pre-assembly convenience, and clear focus on compatibility.

Key Features

• Complete kit: Includes two front CV axle assemblies and two front wheel bearing and hub assemblies so both sides are replaced together for balanced performance.
• Direct fit: Designed as a maintenance-free direct replacement to the original equipment, reducing install time and avoiding modifications.
• Premium seals: Upgraded elastomer seals extend service life by resisting contaminants at the hub and axle interfaces.
• Moly greased: Factory-applied moly grease and a grease shield help reduce premature wear under normal driving conditions.
• Restored performance: Replacing worn components refreshes steering response and road feel for improved front-end control.
• Compatibility guidance: Reference numbers and a full fitment chart are provided to confirm fitment for the listed model years and 4WD front applications.

Who It's For

This kit is aimed at owners of 2003-2006 Ford Expedition and 2003-2006 Lincoln Navigator equipped with four wheel drive who want to replace both front axles and hubs in one job. It suits DIYers comfortable with suspension and drivetrain work and shops that prefer supplying customers with a matched set for both sides.

Those who should look elsewhere include owners of two wheel drive models or vehicles outside the stated years and applications, and anyone requiring OEM-branded components or long-term warranty coverage beyond typical aftermarket limits.

Pros & Cons

Pros

• Good fit and finish that customers report matches factory mounting points and installs without modification.
• Convenience of a four-piece kit means front-end geometry and feel are refreshed in one service.
• Pre-greased axles and upgraded seals lower the chance of early failure when installed correctly.

Cons

• Some users reported mixed boot durability, with a minority experiencing boot tears after installation, so careful inspection on arrival is advised.

Specifications

Our Verdict

This front drivetrain kit is a practical, cost-effective solution for 2003-2006 Expedition and Navigator 4WD owners who want a matched set of axles and hubs to restore steering feel and front-end stability. It offers good fitment and installation convenience, making it strong value for those comfortable doing the swap, though buyers should inspect boots on delivery and confirm fitment against their vehicle references.

Frequently Asked Questions

Does this kit fit two wheel drive models?
No. The kit is specified for four wheel drive front applications on 2003-2006 Expedition and Navigator models; confirm your drivetrain before purchase.

Are the hubs pre-assembled with bearings?
Yes. The kit includes wheel hub assemblies with tapered roller bearings installed as a direct-replacement component.

Should both sides be replaced together?
Replacing both front axles and hubs at the same time restores balanced steering feel and is recommended for best long-term results.