Product Introduction

This front half shaft gear is a precision-forged bevel gear, manufactured from high-strength alloy steel to withstand the high torque loads and dynamic stresses of heavy-duty operation. It features internal splines for connection to the front half shaft and external bevel teeth for meshing with the differential pinions. The gear undergoes strict heat treatment and surface finishing processes, including carburizing and quenching, to ensure exceptional wear resistance, dimensional accuracy, and fatigue strength. Its precision-machined splines and teeth ensure perfect alignment and smooth meshing with the differential pinions and half shaft, minimizing noise, vibration, and power loss during operation.

Core Function

• Serves as the primary interface between the differential pinions and the front half shaft, transferring torque from the differential to the front wheel.

• Meshes with the differential pinions to enable differential rotation between the left and right front wheels, preventing tire skidding and wear during cornering or on uneven road surfaces.

• Maintains precise alignment of the front half shaft, ensuring accurate power transmission and stable handling.

• Withstands the high torque loads and repeated mechanical stresses of heavy-duty operation, providing consistent performance and extended service life.

• Directly interchangeable with the original factory part, ensuring a precise fit and consistent performance within the front axle differential assembly.

Front Half Shaft Gear WG9231320225 Sinotruk – Premium Differential Bevel Gear for Heavy-Duty Trucks

When your heavy-duty truck demands uninterrupted power delivery from the differential to the wheels, every single gear tooth matters. The Front Half Shaft Gear WG9231320225 Sinotruk is a precision-forged bevel gear engineered to handle extreme torque loads while maintaining whisper-smooth meshing inside the drive axle assembly. Built from high-strength alloy steel and hardened through advanced carburizing and quenching processes, this gear delivers the durability, dimensional accuracy, and fatigue resistance that fleet operators and maintenance teams rely on day after day.

At Mettlead, we supply this OEM-quality front half shaft gear directly from our factory in China — giving you genuine performance at a competitive price, backed by strict quality control and fast worldwide delivery. Whether you manage a fleet of Sinotruk HOWO tippers, mixers, or tractor units, this component keeps your drive axle running at peak efficiency.

Key Features and Benefits of Front Half Shaft Gear WG9231320225

Precision-Forged Alloy Steel Construction

This front half shaft gear is manufactured from premium high-strength alloy steel using a precision forging process. As a result, the internal grain structure remains uniform and dense, which significantly improves the gear’s ability to resist cracking and deformation under sustained heavy loads.

Advanced Heat Treatment for Superior Wear Resistance

Each gear undergoes a carefully controlled carburizing and quenching heat treatment cycle. This process creates a hardened outer surface layer while preserving a tough, shock-absorbing core — the ideal combination for components that face constant dynamic stress inside the differential housing.

Internal Splines for Secure Half Shaft Connection

The precision-machined internal splines ensure a tight, play-free fit with the front half shaft. This eliminates backlash and guarantees consistent torque transfer, which in turn reduces vibration and extends the service life of adjacent drivetrain components.

External Bevel Teeth for Smooth Differential Meshing

The external bevel teeth are ground to exacting tolerances, ensuring perfect alignment with the differential pinion gears. Smooth meshing translates directly into lower noise levels, reduced power loss, and more efficient energy delivery to the wheels.

Exceptional Fatigue Strength for Long Service Life

Thanks to the combination of alloy steel composition, forging process, and surface hardening, this Sinotruk front half shaft gear resists fatigue failure even after hundreds of thousands of kilometers of heavy-duty operation. Consequently, you spend less on replacements and experience fewer unplanned downtime events.

OEM-Equivalent Dimensional Accuracy

Every critical dimension — tooth profile, spline pitch, bore diameter, and face width — is machined to OEM specifications. This means the WG9231320225 gear drops directly into your existing Sinotruk drive axle assembly without modification, saving valuable workshop time.

Technical Specifications

Parameter	Details
OEM Part Number	WG9231320225
Part Name	Front Half Shaft Gear (Differential Side Gear)
Brand Compatibility	Sinotruk / HOWO
Gear Type	Bevel Gear (Straight / Spiral Bevel)
Material	High-Strength Alloy Steel
Heat Treatment	Carburizing + Quenching
Surface Hardness	HRC 58–63 (case-hardened surface)
Core Hardness	HRC 30–42
Connection Type	Internal Splines (to half shaft)
Meshing Interface	External Bevel Teeth (to differential pinions)
Manufacturing Process	Precision Forging + CNC Machining + Grinding
Application System	Front Drive Axle Differential Assembly
Quality Standard	OEM-equivalent, strict QC inspection
Packaging	Neutral / White-label / Custom packaging available
Origin	China (Factory Direct)

Application Scenarios

Compatible Vehicles

The Front Half Shaft Gear WG9231320225 is specifically designed for Sinotruk heavy-duty vehicles, including HOWO series dump trucks, tractor heads, concrete mixers, and cargo trucks equipped with front drive axles.

System Application: Drive Axle Transmission

Inside the front drive axle differential, this bevel gear sits on the half shaft and meshes with the differential pinion gears. Its primary role is to transfer torque from the differential assembly to the front half shaft, which ultimately drives the front wheels. In other words, without a properly functioning front half shaft gear, power simply cannot reach the wheels — and your truck stays parked.

Typical Working Conditions

• High-torque, low-speed heavy hauling operations
• Construction site and mining environments with constant load variation
• Long-distance highway transport with sustained rotational speeds
• Off-road and uneven terrain driving where axle loads shift dynamically

For more Sinotruk drivetrain and front axle components, explore our Front Axle Parts category or browse the full Sinotruk HOWO Truck Parts catalog.

OEM/ODM Capability

White-Label and Custom Packaging

Mettlead understands that distributors and wholesalers often need branded packaging solutions. Therefore, we offer flexible white-label and custom packaging options for the WG9231320225 front half shaft gear. Whether you need your company logo on the box, specific labeling for regional markets, or neutral export packaging, our team handles it all.

Strict Quality Control Process

Every batch of front half shaft gears passes through a multi-stage inspection process before shipment:

1. Raw material verification — alloy composition and hardness testing
2. Dimensional inspection — CNC coordinate measuring for spline and tooth profiles
3. Heat treatment validation — surface and core hardness checks
4. Visual and surface finish inspection — checking for cracks, pitting, or machining defects
5. Final packaging audit — ensuring correct labeling and protective wrapping

Factory-Direct Pricing Advantage

Because we source and ship directly from our manufacturing base in China, there are no middlemen inflating the price. Procurement managers benefit from competitive unit costs — especially on bulk orders — without sacrificing quality or delivery speed.

Flexible and Secure Payment

We support multiple payment methods including T/T, L/C, Western Union, and trade assurance options. Additionally, we welcome factory visits and on-site inspections so you can verify quality firsthand before committing to large orders.

Frequently Asked Questions (FAQ)

What exactly does the Front Half Shaft Gear WG9231320225 do in the drive axle?

The front half shaft gear is a bevel-type side gear that sits inside the differential housing. It connects to the front half shaft via internal splines and meshes with the differential pinion gears. Essentially, it receives rotational power from the differential and transmits it to the half shaft, which then drives the front wheel. Without this gear functioning correctly, torque cannot reach the wheel.

What material is the WG9231320225 front half shaft gear made from?

This gear is forged from high-strength alloy steel. After forging and CNC machining, it undergoes a carburizing and quenching heat treatment process. This creates a hard, wear-resistant surface (HRC 58–63) while maintaining a tough, impact-resistant core (HRC 30–42) — a critical balance for gears operating under heavy cyclic loads.

How do I know if this front half shaft gear fits my truck?

The WG9231320225 is an OEM part number for Sinotruk vehicles. If your truck’s original differential side gear carries this part number, our replacement is a direct fit. If you are unsure, simply provide your vehicle model, VIN, or axle assembly number, and our technical team will confirm compatibility.

What are the signs that a front half shaft gear needs replacement?

Common symptoms of a worn or damaged front half shaft gear include unusual clunking or knocking noises from the front axle during acceleration or deceleration, excessive vibration through the drivetrain, uneven tire wear on the front axle, and in severe cases, complete loss of drive to one or both front wheels. If you notice any of these signs, inspecting the differential assembly — including the side gears — is strongly recommended.

Is the tooth profile and spline specification identical to the original Sinotruk part?

Yes. The WG9231320225 gear we supply is manufactured to OEM-equivalent specifications. The bevel tooth profile, module, pressure angle, number of teeth, spline pitch, and bore dimensions all match the original Sinotruk design. This ensures seamless installation and proper meshing with existing differential pinions.

Can I order this front half shaft gear in bulk for my parts distribution business?

Absolutely. Mettlead specializes in wholesale and bulk supply for distributors, fleet operators, and aftermarket retailers worldwide. We offer volume-based pricing, custom packaging, and consistent stock availability for high-demand parts like the WG9231320225.

How should I store this gear before installation?

Store the front half shaft gear in a dry, cool environment away from moisture and corrosive chemicals. Keep it in its original packaging until installation. If the protective oil coating has been removed, apply a light layer of anti-rust oil to the tooth surfaces and splines to prevent surface corrosion.

Ready to Order Your Front Half Shaft Gear WG9231320225?

Getting the right Sinotruk differential parts at the right price shouldn’t be complicated. At Mettlead, we make it simple: factory-direct quality, competitive pricing, fast global shipping, and a technical team that speaks your language.

Here’s how to get started:

1. Send us your part number (WG9231320225) and required quantity
2. Receive a detailed quotation within 24 hours
3. Confirm your order with flexible, secure payment options
4. Receive your parts — carefully packaged and shipped to your door

Whether you need a single piece for an urgent repair or a container load for your warehouse, we are ready to support your business.

👉 Contact Us Now to request a quote or ask any technical questions about the Front Half Shaft Gear WG9231320225 Sinotruk.

Browse more genuine Sinotruk replacement parts in our Sinotruk Truck Parts collection, or explore our complete Front Axle Components range for drive axle gears, bearings, seals, and more.