Product Introduction

This ST16 rear axle housing is a heavy-duty, precision-cast component, manufactured from high-strength ductile iron to withstand the extreme loads, vibrations, and stresses encountered during heavy-duty operation. It features a robust, one-piece design with precision-machined mounting surfaces, bearing bores, and bolt holes, ensuring accurate alignment of all internal components. The housing undergoes rigorous heat treatment and surface finishing processes, including a protective coating, to provide exceptional durability, resistance to impact and fatigue, and protection against corrosion. Its integrated design includes mounting points for the suspension, brake components, and wheel hubs, making it the central structural element of the ST16 rear axle.

Core Function

• Serves as the primary structural housing for the ST16 rear axle’s differential, main reducer, and axle shafts, providing a rigid foundation for all internal drivetrain components.

• Maintains precise dimensional alignment of the differential gears, main reducer gears, and axle shafts, ensuring efficient power transmission and minimizing noise, vibration, and wear.

• Withstands and distributes the vertical loads from the vehicle’s weight, as well as the lateral and longitudinal forces generated during braking, acceleration, and cornering.

• Provides a sealed, oil-retaining cavity to ensure proper lubrication of the internal gears and bearings, while preventing the ingress of dirt, water, and other contaminants.

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

ST16 Rear Axle Housing AZ9231330569 – Genuine Sinotruk Replacement Part

When your heavy-duty truck demands a reliable rear axle housing that can shoulder thousands of tonnes over millions of kilometres, settling for anything less than OEM-grade quality simply isn’t an option. The ST16 Rear Axle Housing AZ9231330569 is purpose-built for Sinotruk’s legendary ST16 drive axle, delivering the structural integrity and precision fitment that fleet operators and procurement managers worldwide depend on. At Mettlead, we bring this critical drivetrain component straight from the factory floor to your doorstep — no middlemen, no markups, and absolutely no compromises on quality.

Key Features and Benefits of ST16 Rear Axle Housing AZ9231330569

So what makes this particular rear axle housing stand out from the crowd? Let’s break it down.

Engineered for Maximum Load-Bearing Capacity

First and foremost, this axle housing is designed to bear the full weight of the truck body and cargo bed. Whether you’re hauling construction aggregates or long-distance freight, the AZ9231330569 housing distributes stress evenly across its cast structure, preventing fatigue cracks and premature failure under extreme loads.

Superior Protection for Internal Drivetrain Components

Beyond carrying weight, this housing acts as a protective shell for your differential assembly, half shafts, and other critical transmission components. Its sealed design keeps contaminants out while retaining lubricant, ensuring your drivetrain internals stay clean and properly lubricated throughout their service life.

Precise Torque Transmission

Furthermore, the rear axle housing serves as the structural backbone that transmits driving force from the differential to the wheels. Every mounting surface is machined to tight tolerances, which means power delivery remains smooth and efficient — even under heavy torsional stress.

Direct Factory Sourcing Advantage

As a result of our direct manufacturing partnerships in China, we eliminate unnecessary supply chain layers. This translates to competitive factory-direct pricing without sacrificing the strict quality control standards that Sinotruk components demand. Additionally, our flexible and secure payment methods make international procurement hassle-free.

Technical Specifications

Below you’ll find the detailed parameters for this rear axle housing. We understand that precision matters when you’re matching parts to your fleet, so we’ve compiled all the essential data in one place.

Application Scenarios

Understanding exactly where and how this part performs helps you make a more informed purchasing decision. Here’s a closer look at its real-world applications:

• Compatible Axle: Specifically engineered for the Sinotruk ST16 drive axle assembly, ensuring seamless bolt-on fitment with no modifications required.
• Primary Function: The rear axle housing bears the combined weight of the vehicle body and cargo bed, houses and protects the differential and half shafts, and transmits driving force to the rear wheels.
• Vehicle Applications: Widely used across HOWO and Steyr series highway tractor trucks, heavy-duty dump trucks, and other on-road vehicles built for demanding payload requirements.
• Operating Conditions: Built to perform reliably in high-mileage long-haul operations, overloaded mining site transport, and continuous-duty construction logistics.

In other words, if your fleet relies on Sinotruk’s proven ST16 axle platform, this housing is the exact replacement part that keeps your trucks rolling without unexpected downtime.

OEM/ODM Capabilities

We recognise that different markets have different requirements. That’s precisely why Mettlead offers flexible service options tailored to your business needs:

• White-Label Packaging: Want to sell under your own brand? We provide neutral or custom-branded packaging that aligns with your company identity and local market expectations.
• Custom Packaging Solutions: Whether you need reinforced export crating, specific labelling standards, or bundled kitting with related axle components, our team adapts to your specifications.
• Strict Quality Control: Every ST16 rear axle housing undergoes rigorous dimensional inspection, surface quality checks, and material verification before it leaves our facility. Consequently, you receive parts that meet or exceed original equipment standards.
• Factory Visits Welcome: We encourage procurement teams to visit our supply facilities in China. Seeing our quality processes firsthand builds the confidence that long-term partnerships require.

Explore our complete range of Sinotruk HOWO Truck Parts to discover additional components for your fleet. You can also browse our dedicated Rear Axle Parts Category for related housings, shafts, and differential assemblies.

Frequently Asked Questions (FAQ)

What is the exact function of the ST16 Rear Axle Housing AZ9231330569?

This rear axle housing performs three critical roles simultaneously. It bears the structural load of the truck body and cargo, it encases and protects internal drivetrain components like the differential and half shafts from road debris and contamination, and it serves as the rigid framework through which driving torque is transmitted to the wheels. Think of it as the skeleton of your entire rear axle assembly.

Which truck models does the AZ9231330569 rear axle housing fit?

The AZ9231330569 is specifically designed for vehicles equipped with the Sinotruk ST16 drive axle. This includes HOWO series highway tractor trucks, Steyr series dump trucks, and various other Sinotruk heavy-duty on-road models. However, we always recommend confirming your vehicle’s axle model number before ordering to ensure a perfect match.

How can I verify that this ST16 rear axle housing meets OEM quality standards?

Each housing passes through our strict quality control process, which includes dimensional accuracy measurement, surface defect inspection, and material composition verification. Moreover, because we source directly from established Chinese manufacturers who supply Sinotruk’s production lines, the components you receive are produced to the same specifications as original equipment parts.

What are the common signs that a rear axle housing needs replacement?

Typically, you should inspect for visible cracks or fractures in the housing body, excessive oil leakage around sealing surfaces, unusual vibrations or noise from the rear axle area, and any deformation caused by overloading or impact damage. If you notice any of these symptoms, replacing the housing promptly prevents cascading damage to the differential and half shafts inside.

Can I order the ST16 Rear Axle Housing with custom or neutral packaging?

Absolutely. We offer white-label and custom packaging options specifically designed for resellers and distributors who prefer to market parts under their own brand. Simply let us know your packaging requirements when you submit your inquiry, and our team will accommodate accordingly.

How does the AZ9231330569 housing handle extreme load conditions?

The housing is manufactured from high-strength cast steel and treated with anti-corrosion coating, which together provide exceptional resistance to both mechanical fatigue and environmental degradation. As a result, it maintains structural integrity even under overloaded conditions commonly encountered in mining and construction transport applications.

Ready to Secure Your ST16 Rear Axle Housing?

Stop wasting time with unreliable suppliers and inflated middleman prices. Whether you need a single replacement unit or bulk quantities for your parts inventory, Mettlead delivers factory-direct ST16 Rear Axle Housing AZ9231330569 with fast lead times and competitive pricing that protects your bottom line.

Take the next step today:

• Get a personalised quote tailored to your order volume
• Confirm part compatibility with your specific fleet configuration
• Ask about our white-label packaging for resale opportunities

👉 Contact Us Now to request your free quotation and discover why procurement managers across Africa, Southeast Asia, the Middle East, and South America trust Mettlead as their go-to source for genuine Sinotruk truck parts.

Looking for more Sinotruk components? Visit our comprehensive Sinotruk Truck Parts catalogue to find everything from engine components to chassis accessories — all available at factory-direct prices with global shipping.