Product Introduction

This first 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 first rear axle.

Core Function

• Serves as the primary structural housing for the first 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 multi-axle drivetrain.

First Rear Axle Housing AZ9231330588 Sinotruk – Heavy-Duty OEM Replacement

When your Sinotruk heavy truck demands a reliable first rear axle housing, the AZ9231330588 delivers exactly what the drivetrain needs — structural integrity, precise fitment, and long-lasting load-bearing performance. Engineered to OEM specifications, this axle housing serves as the backbone of your first rear axle assembly, supporting transmission components and carrying the full weight of your payload mile after mile.

At Mettlead, we supply this genuine-spec first rear axle housing directly from our factory in China, which means you get competitive pricing without compromising on quality. Whether you’re restocking your warehouse or sourcing a single replacement unit, we’re ready to fulfill your order with fast, dependable delivery.

Key Features and Benefits of the AZ9231330588 First Rear Axle Housing

This isn’t just another axle housing sitting on a shelf. Every unit goes through strict quality control before it leaves our facility. Here’s what makes it stand out:

• OEM-Grade Fitment – Manufactured to match the original Sinotruk specifications, so installation is seamless with no modifications required.
• Superior Load-Bearing Capacity – Built from high-strength cast steel, this housing withstands extreme axle loads typical in heavy-duty transport and construction applications.
• Corrosion-Resistant Surface – Treated with protective coatings to resist rust and environmental degradation, extending service life even in harsh operating conditions.
• Precision-Machined Mounting Points – Every bolt hole, bearing seat, and mating surface is machined to tight tolerances, ensuring proper alignment of internal drivetrain components.
• Supports Full Drivetrain Assembly – Designed to house the differential, axle shafts, and related transmission components securely within the first rear axle position.
• Factory-Direct Pricing – By sourcing directly from Mettlead, you eliminate middlemen and reduce your procurement costs significantly.

Application Scenario

The First Rear Axle Housing AZ9231330588 is specifically designed for Sinotruk heavy-duty vehicles. Positioned at the first rear axle, this housing plays a critical role in the vehicle’s drivetrain system. It supports and encloses the transmission components — including the differential gears and axle shafts — while simultaneously bearing the full vehicle load transferred through the suspension system.

In practical terms, this means the axle housing absorbs road shocks, resists torsional forces during acceleration and braking, and maintains structural rigidity under maximum payload. It’s an essential component for long-haul logistics trucks, mining dump trucks, and construction vehicles that operate under continuous heavy loads.

Looking for more compatible Sinotruk components? Browse our full Sinotruk HOWO Truck Parts catalog or explore our dedicated Rear Axle Parts category for related assemblies and sub-components.

Technical Specifications

OEM/ODM Capability

We understand that different markets have different requirements. That’s why Mettlead offers flexible OEM and ODM services for the First Rear Axle Housing AZ9231330588 and other Sinotruk parts:

• White-Label Packaging – Need your own brand on the box? We provide custom packaging with your logo, part numbers, and branding elements.
• Custom Packaging Solutions – From individual cartons to bulk palletized shipments, we tailor packaging to your logistics requirements.
• Strict Quality Control – Every axle housing undergoes dimensional inspection, surface quality checks, and material verification before dispatch.
• Bulk Order Support – Whether you need 10 units or 1,000, our production capacity scales to meet your demand with consistent lead times.
• Technical Documentation – We can supply certificates of conformity, material test reports, and detailed product drawings upon request.

For a comprehensive overview of all available Sinotruk components we carry, visit our Sinotruk Truck Parts page.

Frequently Asked Questions

What is the function of the first rear axle housing on a Sinotruk truck?

The first rear axle housing (AZ9231330588) serves as the structural shell of the first rear axle assembly. It encloses and protects the differential, ring gear, pinion, and axle shafts while bearing the vertical load of the vehicle and payload. Essentially, it’s the rigid framework that keeps your entire rear drivetrain aligned and operational.

Is this AZ9231330588 axle housing an exact fit for my Sinotruk HOWO truck?

Yes. This first rear axle housing is manufactured to match the original Sinotruk OEM dimensions and mounting specifications. It’s a direct bolt-on replacement — no drilling, welding, or modification needed. However, if you’re unsure about compatibility with a specific model year or variant, feel free to send us your VIN or chassis number for confirmation.

What material is the First Rear Axle Housing AZ9231330588 made from?

It’s constructed from high-strength cast steel, which provides the rigidity and fatigue resistance required for heavy-duty axle applications. The casting process ensures uniform wall thickness and structural consistency throughout the housing.

How does Mettlead ensure the quality of this rear axle housing?

Every AZ9231330588 first rear axle housing passes through our multi-point quality control process. This includes dimensional accuracy checks on all machined surfaces, visual inspection for casting defects, and verification of bearing seat tolerances. Only units that meet our strict standards are approved for shipment.

Can I order this axle housing with custom or neutral packaging?

Absolutely. We offer white-label and custom packaging options. You can have your brand name, logo, and part number printed on the packaging — ideal for distributors and resellers who want a professional presentation for their customers.

What’s the typical lead time for the AZ9231330588 first rear axle housing?

For standard stock orders, we typically ship within 3–7 business days. Larger bulk orders or custom-packaged shipments may require 10–15 days depending on quantity. We always confirm exact timelines before you place your order.

Does this axle housing come with any internal components like bearings or seals?

This listing is for the axle housing shell only. Internal components such as bearings, seals, differential gears, and axle shafts are sold separately. If you need a complete rear axle assembly or specific internal parts, we can provide a bundled quotation — just let us know.

Ready to Source Your First Rear Axle Housing AZ9231330588?

Getting the right part at the right price shouldn’t be complicated. At Mettlead, we make it simple: factory-direct pricing, verified quality, and responsive support from a team that understands heavy truck parts inside and out.

Whether you need a single unit or a container load of Sinotruk first rear axle housings, we’re here to help you move forward. Send us your inquiry today and receive a competitive quote with clear lead times and flexible payment options.

Contact Us Now to request pricing, confirm fitment, or discuss your bulk order requirements. Our team typically responds within 24 hours.