Rear Diff Complete TRX420 FE/FM/TE/TM/FPE/FPM 2007-2013 is a purpose-built rear final gear assembly designed to restore precise torque transfer and smooth operation to your Honda Rancher TRX420, across the FE, FM, TE, TM, FPE and FPM trim lines from 2007 through 2013. This aftermarket replacement delivers a direct-fit solution that keeps your quad’s rear end aligned with factory mounts, seals and quick hooks, so you can get back to trail riding or farm work with minimal downtime. Built to withstand muddy trails and hard use, it’s engineered for reliable performance when the original unit shows signs of wear or failure. This aftermarket rear final gear assembly tackles common wear-and-tear issues head-on: gear backlash, worn tooth engagement, and sloppy torque transfer that can lead to vibration, noise, or uneven power delivery. By using precision-machined components and robust materials, this replacement maintains correct gear ratios and lash, delivering dependable traction and long service life whether you’re hauling the load across rough terrain or navigating tight coulees on a job site. With this heavy-duty unit, you’re choosing a reliable alternative designed for the demands of trail riding and farm work alike.

Comprehensive Vehicle Fitment

Manufacturer	Models / Series	Years / Details
Honda	TRX420FE (Rancher 4x4 ES EPS)	2007–2013
Honda	TRX420FM (Rancher 4x4)	2007–2013
Honda	TRX420TE (Rancher 2x4 ES)	2007–2013
Honda	TRX420TM (Rancher 2x4)	2007–2013
Honda	TRX420FPE (Rancher 4x4 ES EPS)	2009–2013
Honda	TRX420FPM (Rancher 4x4 EPS)	2009–2013

Product Specifications

Attribute	Details
OEM Reference Part Numbers	41300-HP5-600, 41311-HP5-600, 41320-HP5-600, 41421-HP5-600, 41431-HP5-600, 41541-HA0-000, 90242-MB0-000
Type	Rear final gear / rear differential assembly
Manufacturer	Aftermarket Replacement
Application	Honda TRX420 Rancher (FE/FM/TE/TM/FPE/FPM) 2007–2013
Gear Ratio	13:41 (typical for TRX420 rear final drive)
Input Spline Count	20
Output Shaft Spline Count	34
Lubricant	SAE 80 hypoid gear oil (recommended fill and check per service procedure)
Location	Rear
Material (typical construction)	High-strength alloy steel gears; robust housing (engineered for durability in off-road use)
Weight	Approximately 5.0–5.2 kg (varies by exact SKU and casting)

OEM & Aftermarket Cross-Reference Information

Part Number	Brand / Type	Cross-Reference Notes
41300-HP5-600	OEM / Rear final gear	Primary reference for TRX420 Rancher rear final drive
41311-HP5-600	OEM Cross-Reference	Common cross-compatibility across TRX420 variants
41320-HP5-600	OEM Cross-Reference	Alternative OEM reference for re-builds
41421-HP5-600	OEM Cross-Reference	Direct compatibility for listed TRX420 models
41431-HP5-600	OEM Cross-Reference	Direct compatibility for listed TRX420 models
41541-HA0-000	OEM Cross-Reference	Frequent cross-reference for 2009–2013 variants
90242-MB0-000	OEM Cross-Reference	Cross-reference in several swap kits

What's Included

Each box includes the essential component needed to restore the rear drive on the listed TRX420 models.

• 1 x Rear Final Gear Assembly

Note: Related seals, gaskets, mounting hardware, and lubricant are not included unless explicitly listed in the product SKU. Always verify what’s in your specific package before installation.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely matched to the TRX420 Rancher rear end, ensuring proper mounting alignment and quick installation.
• OEM Cross-Reference Coverage: Wide cross-reference support means easier future replacements and compatibility with common OEM references.
• Premium Materials: Built from high-strength steel gears and a rugged housing designed to resist off-road shocks and mud exposure.
• Performance Restoration: Restores original torque transfer characteristics and gear engagement for confident pulling power in trails and farm work.
• Reliable Build for Harsh Environments: Engineered to handle debris, splashes, and repetitive load cycles typical of ranch and trail riding.
• Cost-Effective Alternative: Provides a durable, non-OEM option with proven fitment at a competitive price point.

Installation Notes:

• Drain and replace the final-drive lubricant with SAE 80 hypoid gear oil before reassembly.
• Inspect and replace seals and O-rings around the differential housing to prevent leaks after install.
• Verify the part number (41200–HP5–600 range references) matches the old unit to ensure correct fitment for your model variant.
• Clean all mounting surfaces and remove any residue from previous seals to guarantee a lube-tight seal and proper bearing seating.
• Torque critical fasteners to the OEM-recommended specifications and verify play in the output shaft after assembly.
• After installation, rotate the rear axle by hand to check for binding or abnormal spacing before test driving.

Why Upgrade?

A worn rear differential can cause gear backlash, slipping, or uneven torque distribution that reduces traction and control. Upgrading to this aftermarket complete rear differential restores intended power transfer, minimizes noise, and extends the life of the driveline—so you can keep working the land or enjoying the trails with confidence.