Product Introduction

Structure: A robust, precision-machined housing constructed from high-strength cast iron and alloy steel, featuring integrated mounting flanges, gear bores, and oil passages for lubrication. The housing includes a splined input/output hub for connection to the drive axle and wheels, with bolt holes for secure assembly.Performance: Provides a rigid, enclosed structure for the differential gears, ensuring precise alignment and load distribution. The heavy-duty construction withstands high torque loads and road impacts, while integrated oil passages maintain proper lubrication for smooth operation.Design: Directly interchangeable with original equipment, engineered to fit perfectly with the differential gear set and axle housing, ensuring leak-free operation and optimal performance.

Core Function

• Gear Enclosure: Encloses and protects the differential gear set (side gears, pinion gears, and cross shaft) from environmental contaminants and physical damage.

• Load Transmission: Transmits torque from the drive shaft to the drive wheels, while allowing them to rotate at different speeds during cornering.

• Lubrication Management: Integrated oil passages ensure proper lubrication of the gear set, reducing friction and extending service life.

• OE Replacement: Directly interchangeable with the original differential housing, preserving the drive axle’s performance and reliability.

Differential Housing AZ9231320274 Sinotruk – Heavy-Duty Differential Case for HOWO Trucks

When your heavy-duty truck’s drivetrain demands unwavering protection and precision, the Differential Housing AZ9231320274 Sinotruk steps up to the task. Engineered to encapsulate and shield the internal gear assembly within the rear axle, this differential case bears the full brunt of transmission loads while keeping every component running smoothly. Whether you’re maintaining a fleet or sourcing replacement parts for a single vehicle, this genuine-spec housing delivers the durability and dimensional accuracy that Sinotruk platforms require.

At Mettlead, we supply this differential housing directly from our factory in China — meaning you get competitive pricing, fast lead times, and strict quality assurance without the middleman markup. Ready to secure your supply? Contact us today for a personalized quote.

Key Features and Benefits of the Differential Housing AZ9231320274

This isn’t just a metal shell — it’s the backbone of your truck’s differential system. Here’s what makes the AZ9231320274 differential housing a smart investment:

• Robust Load-Bearing Construction: Cast from high-strength materials, this housing is purpose-built to withstand the intense torque and rotational forces generated during heavy hauling operations.
• Precision-Machined Tolerances: Every bore, mounting surface, and seal seat is machined to OEM specifications, ensuring a perfect fit with mating components like ring gears, bearings, and differential spiders.
• Internal Gear Protection: The housing acts as a protective enclosure for the differential gear set, shielding it from contaminants, debris, and impact damage that could compromise drivetrain performance.
• Corrosion-Resistant Finish: Surface treatment helps resist rust and oxidation, extending service life even in harsh operating environments.
• Direct OEM Replacement: Designed as a drop-in replacement for the original Sinotruk part number AZ9231320274, so installation is straightforward with no modifications needed.
• Cost-Effective Factory-Direct Pricing: By sourcing through Mettlead, you eliminate unnecessary supply chain layers and keep your maintenance budget under control.

Technical Specifications – Differential Housing AZ9231320274 Sinotruk

Need the full dimensional drawing or weight confirmation? Reach out to our team and we’ll provide detailed technical documentation.

Application Scenario – Where Does This Differential Housing Fit?

The Differential Housing AZ9231320274 is specifically designed for Sinotruk heavy-duty vehicles, including the widely deployed HOWO truck series. Within the rear axle assembly, this differential case serves a critical role:

• Enclosing the Differential Gear Set: It wraps around the spider gears, side gears, and cross pin, holding them in precise alignment during operation.
• Bearing Transmission Loads: As torque flows from the driveshaft through the ring gear and into the differential, this housing absorbs and distributes mechanical stress across its structure.
• Protecting Internal Components: Road debris, moisture, and thermal cycling can degrade exposed gears rapidly. The housing creates a sealed environment that preserves gear integrity over hundreds of thousands of kilometers.

In short, if your Sinotruk truck’s differential housing shows cracks, wear, or damage from overloading, replacing it promptly prevents cascading failures in the entire rear axle system.

Explore more compatible components in our Rear Axle Parts category, or browse the full Sinotruk HOWO Truck Parts catalog for additional spares.

OEM/ODM Capability – Tailored to Your Business Needs

Mettlead understands that different markets have different requirements. That’s why we offer flexible manufacturing and branding options for the Differential Housing AZ9231320274 and our entire product range:

• White-Label Packaging: Receive products in neutral packaging, ready for your own branding and distribution channels.
• Custom Packaging: We can print your logo, part numbers, and branding directly on the box — helping you build brand recognition in your local market.
• Strict Quality Control: Every differential housing undergoes dimensional inspection, surface quality checks, and material verification before it leaves our facility.
• Factory Visits Welcome: We encourage prospective partners to visit our production site in China. Seeing our processes firsthand builds the trust that long-term partnerships require.
• Flexible Payment Terms: We support multiple secure payment methods to accommodate international transactions of all sizes.

Whether you need 10 units or 10,000, our production capacity scales to meet your demand without sacrificing quality or delivery timelines.

Frequently Asked Questions – Differential Housing AZ9231320274 Sinotruk

What exactly does the differential housing AZ9231320274 do in the rear axle?

Think of it as the protective shell and structural backbone of the differential assembly. It holds the internal gear components — including side gears and spider gears — in precise alignment while absorbing the rotational forces transmitted through the drivetrain. Without a sound housing, the entire gear set would be exposed to damage and misalignment.

Which truck models is this differential housing compatible with?

The AZ9231320274 is designed for Sinotruk heavy-duty vehicles, primarily the HOWO series. However, since Sinotruk shares certain axle platforms across models, it may also fit select SITRAK configurations. We recommend confirming your vehicle’s VIN or existing part number with our team before ordering.

How can I tell if my differential housing needs replacement?

Common signs include visible cracks or fractures on the housing surface, oil leaks around the differential area, unusual noise from the rear axle during operation, or excessive play in the differential assembly. If you notice any of these symptoms, inspecting the housing should be a priority — because a compromised case can quickly lead to total differential failure.

Is this an original Sinotruk part or an aftermarket replacement?

This is an OEM-equivalent aftermarket part manufactured to match the original Sinotruk specifications for part number AZ9231320274. It offers the same dimensional accuracy, material strength, and fitment as the factory-installed component, but at a more competitive price point.

What material is the differential housing made from?

The housing is cast from high-strength iron or steel alloy — the same class of material used in the original equipment. This ensures it can handle the sustained torque loads and thermal cycling that heavy-duty truck differentials experience daily.

Can I order this part with my own branding on the packaging?

Absolutely. Mettlead offers both white-label and fully customized packaging options. Just let us know your branding requirements when you place your inquiry, and we’ll accommodate your specifications.

Get Your Differential Housing AZ9231320274 – Request a Quote Now

Keeping your fleet on the road starts with sourcing the right parts from a reliable supplier. The Differential Housing AZ9231320274 Sinotruk is in stock and ready to ship — with factory-direct pricing that protects your bottom line.

Here’s how to get started:

1. Contact us with your part number and required quantity.
2. Receive a competitive quote with lead time and shipping options within 24 hours.
3. Approve the order and choose your preferred secure payment method.
4. Receive your parts — quality-inspected and professionally packaged.

Browse our complete range of Sinotruk Truck Parts to find everything you need in one place. From rear axle components to engine parts and cabin accessories, Mettlead is your one-stop source for Chinese heavy truck spares worldwide.