Rear Differential Pinion Gear For Honda TRX 420 2007 2020 Fits TE TM FE FM ATV Models
Rear Differential Pinion Gear For Honda TRX 420 2007 2020 Fits TE TM FE FM ATV Models is backordered and will ship as soon as it is back in stock.
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This Rear Differential Pinion Gear is a robust aftermarket replacement designed to restore precise torque transfer in the rear drive of TRX 420 ATVs. It fits model years 2007 through 2020 across the TE/TM/FE/FM variants, delivering consistent mesh with the ring gear and steady power delivery on demanding trails or farm work. Replacing a worn pinion gear helps eliminate abnormal noise, backlash, and the risk of drivetrain failure during tough off-road use.
Built to withstand harsh conditions and regular use, this aftermarket pinion gear uses hardened alloy steel and precision machining to resist wear, heat, and shock loads. It’s engineered to be a reliable choice for rugged trail riding and rural tasks, maintaining proper alignment and improving long-term durability even in dusty or muddy environments.
Comprehensive Vehicle Fitment
| Manufacturer | Models / Series | Years / Details |
|---|---|---|
| Honda | TRX 420 TE/TM/FE/FM | 2007-2020, Rear Differential Pinion Gear replacement |
| Honda | TRX 420 Rancher / TRX420 variants | 2007-2013 (typical rear final-drive family references) |
| Honda | TRX 420 FE / FM / TE / TM | 2007-2013 (specific sub-model notes may vary by subfamily) |
Product Specifications
| Attribute | Details |
|---|---|
| OEM Reference Part Numbers | 41300-HP5-600; 41311-HP5-600; 41320-HP5-600; 41421-HP5-600; 90242-MB0-000 |
| Type | Rear Differential Pinion Gear / Final Drive Gear Assembly |
| Manufacturer | Aftermarket Replacement |
| Application | TRX 420 TE/TM/FE/FM (2007-2020) |
| Material | Hardened alloy steel |
| Gear Ratio | 13:41 |
| Pinion Teeth | 13 |
| Ring Gear Teeth | 41 |
| Input Spline Count | 20 |
| Output Spline Count | 34 |
| Lubrication | SAE 80 hypoid gear oil (as per OEM service guidance) |
| Finish | Black oxide / standard machined finish |
OEM & Aftermarket Cross-Reference Information
| Part Number | Brand / Type | Cross-Reference Notes |
|---|---|---|
| 41300-HP5-600 | Honda OEM | Rear Final Gear Assembly; primary OEM reference; cross-references include 41311-HP5-600, 41320-HP5-600, 41421-HP5-600, 90242-MB0-000. |
| 41311-HP5-600 | OEM Alternate | Cross-reference for TRX420 rear final-drive components. |
| 41320-HP5-600 | OEM Alternate | Cross-reference for TRX420 rear final-drive components. |
| 41421-HP5-600 | Aftermarket / Dirt Racing | Common aftermarket cross-reference used for 2007-2013 TRX420 models. |
| 90242-MB0-000 | OEM Cross-Ref | Additional OEM cross-reference listed in aftermarket catalogs. |
What's Included
This package includes the essential component for reviving your rear differential drive: Rear Differential Pinion Gear.
- Rear Differential Pinion Gear
Note: Related parts such as seals, bearings, oil, and mounting hardware are not included and are typically sold separately.
Why Choose This Aftermarket Replacement?
- Direct-Fit Compatibility: Precision-machined to align with the TRX 420 rear differential housing and mounting points, reducing install time and ensuring proper mesh with the ring gear.
- OEM Cross-Reference: Backed by multiple OEM cross-reference numbers to simplify sourcing and replacement planning.
- Premium Materials: Constructed from hardened alloy steel for enhanced wear resistance and long service life in challenging environments.
- Accurate Gear Mesh: Engineered with a precise 13:41 final-drive ratio to restore original torque transfer characteristics.
- Performance Restoration: Restores smooth power delivery, reduces noise, and minimizes the risk of drivetrain damage under load.
- Value-Driven Durability: A cost-effective repair option designed for frequent use on trails and farm tasks without sacrificing reliability.
Installation Notes:
- Drain the differential oil and inspect for metal debris before removing the housing to identify wear patterns.
- Mark the orientation of the pinion relative to the carrier to preserve correct gear mesh upon reassembly.
- Clean all mating surfaces and check seals; replace worn seals to prevent a differential oil leak.
- Lubricate the assembly with the recommended hypoid gear oil and ensure the oil level is correct after assembly.
- Torque all retaining fasteners to the service manual specifications using a calibrated torque wrench; follow a standard cross-pattern if applicable.
- After installation, rotate the assembly by hand to verify smooth operation and absence of binding before reinstalling the differential cover.
Why Upgrade?
Running a worn rear differential pinion gear can lead to improper torque transfer, increased heat, and progressive wear that culminates in differential failure. Upgrading to this aftermarket pinion gear restores reliable, consistent power delivery and protects the drivetrain from further damage on demanding terrain.
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