Restore the reliability of your Honda TRX 420’s front drivetrain with this Front Differential Bearing And Seal Kit. Specifically designed to fit multiple 2007–2014 TRX 420 variants (including IRS and non-IRS models), this kit replaces worn bearings and seals that can cause gear lash, leaks, and noise. A proper front-diff service keeps the bevel gears properly aligned and protects the system from dirt, water, and harsh operating conditions on trail or farm work.

This aftermarket replacement brings a proven combination of durability and precise fit, tackling common wear from off-road use such as play in the drive setup, oil seepage at the differential, and degraded oil seals. Built to stand up to mud, vibration, and temperature swings, it’s a reliable choice for riders and workers who demand consistent performance and reduced maintenance downtime in tough environments.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This kit includes all bearings and seals found in the front differential.

• Front differential bearings
• Front differential oil seals
• Axial shaft seals
• Seal races and related wear components

Note: Oil, mounting hardware, and any non-differential gaskets are not included unless stated on the packaging.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely engineered to drop into Honda TRX 420 front differential locations without modification.
• OEM Cross-Reference Support: Built to align with OEM specifications and provide reliable interchangeability for the listed models.
• Premium Materials: Durable bearing steel and robust elastomer seals designed for off-road exposure and moisture resistance.
• Performance Restoration: Replaces worn components to restore proper gear meshing, reduce backlash, and quiet operation.
• Long-Term Durability: Built to handle dust, mud, heat, and vibration common in trail and farm use.
• Cost-Efficient Upgrade: A practical aftermarket solution that delivers service-life value without OEM pricing.

Installation Notes:

• Safely suspend the vehicle and drain front-differential oil before disassembly to prevent oil spills and contamination.
• Inspect the front differential housing for wear or scoring; replace any damaged surfaces to ensure a proper seal.
• Clean all mating surfaces thoroughly and remove old sealant or gasket material before installing new seals.
• Lightly lubricate new seals with clean oil or assembly lube to aid seating and prevent pinching during installation.
• Follow the vehicle’s service manual for orientation and order of assembly; avoid mixing up left/right or in/out seals during reassembly.
• Use appropriate tooling for bearing seating (press or bearing heater as required) to avoid misalignment or damage.

Why Upgrade?

Running a worn front-differential bearing or seal can lead to increased gear lash, oil leaks, overheating, and accelerated wear of the differential gears. This replacement restores proper clearance and sealing, preserving drivetrain integrity and reducing the risk of a costly, roadside failure during demanding trail work or farm tasks.