Product Introduction

Structure: A robust cast iron housing enclosing a precision-machined differential gear set (including side gears, pinion gears, and cross shaft), with an integrated splined output shaft for connection to the drive wheels. The housing features mounting holes and oil passages for lubrication and cooling.Performance: Efficiently transmits torque to the drive wheels while allowing them to rotate at different speeds during cornering, ensuring stable and predictable handling. The precision-machined gears minimize friction and noise, while the heavy-duty construction withstands the high torque loads of heavy-duty operation.Design: Directly interchangeable with original equipment, engineered to fit perfectly with the drive axle housing and drive shafts, maintaining precise gear alignment and reducing wear.

Core Function

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

• Load Bearing: Withstands the high torque loads generated during heavy-duty operation, ensuring reliable performance under extreme conditions.

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

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

Differential Assy AZ9231320271 Sinotruk – OEM-Quality Rear Axle Assembly for HOWO Heavy Trucks

When your heavy-duty fleet depends on reliable power transmission, every component in the drivetrain matters. The Differential Assy AZ9231320271 Sinotruk is engineered to regulate wheel speed differences and deliver consistent driving force to the rear axle — keeping your HOWO trucks moving efficiently under the toughest operating conditions. Sourced directly from our factory in China, this differential assembly meets strict OEM specifications while offering the competitive pricing that procurement managers demand.

At Mettlead, we specialize in supplying genuine-equivalent parts for SINOTRUK, HOWO, SHACMAN, FAW, WEICHAI, DONGFENG, and FOTON heavy trucks. With factory-direct pricing, comprehensive quality control, and fast global delivery, we help fleet operators and distributors reduce downtime and control costs. Ready to get a quote? Contact us today.

Key Features and Benefits of Differential Assy AZ9231320271

This Sinotruk differential assembly is more than just a replacement part — it is a precision-engineered component designed to handle extreme torque loads while maintaining smooth power distribution. Here is what sets it apart:

• Accurate Wheel Speed Regulation – The differential mechanism allows left and right wheels to rotate at different speeds during cornering, reducing tire wear and improving vehicle stability.
• Robust Power Transmission – Built with high-strength gears and hardened shafts, this assembly efficiently transfers driving force from the driveshaft to the rear wheels, even under heavy payloads.
• OEM-Equivalent Precision – Manufactured to match the original AZ9231320271 specifications, ensuring a direct bolt-on fit without modifications.
• Extended Service Life – Heat-treated alloy steel construction resists fatigue and wear, delivering reliable performance over hundreds of thousands of kilometers.
• Strict Quality Control – Every unit undergoes dimensional inspection, hardness testing, and load simulation before shipment to guarantee consistent performance.
• Cost-Effective Factory-Direct Pricing – By eliminating middlemen, we pass significant savings directly to your procurement budget.

Whether you are maintaining a mining fleet or managing long-haul logistics vehicles, this differential assembly delivers the durability and precision your operations require. Explore our full range of rear axle components for additional drivetrain solutions.

Technical Specifications – Differential Assy AZ9231320271 Sinotruk

Below you will find the detailed technical parameters for this differential assembly. These specifications help ensure you are ordering the correct part for your specific vehicle configuration.

Note: If you need to cross-reference this part number with your vehicle’s VIN or axle model, our technical team is happy to assist with verification.

Application Scenario – Where Does This Differential Assembly Fit?

The Differential Assy AZ9231320271 is specifically designed for Sinotruk HOWO heavy-duty vehicles. As a core component of the rear axle system, it plays a critical role in everyday vehicle operation:

• Compatible Vehicles: Sinotruk HOWO series heavy trucks (A7, T7H, and related models equipped with the corresponding rear axle configuration).
• Primary Function: This differential assembly regulates the rotational speed between the left and right drive wheels, particularly during turns, while simultaneously transmitting driving force from the engine through the driveshaft to the wheels.
• Typical Working Conditions: Long-haul highway transport, mining and quarry operations, construction site logistics, and heavy-load urban delivery routes.

In short, whenever your Sinotruk vehicle needs to navigate curves, handle uneven terrain, or maintain traction under load, this differential assembly is doing the heavy lifting behind the scenes. For a broader selection of Sinotruk components, visit our Sinotruk HOWO truck parts category page.

OEM/ODM Capability – Tailored to Your Business Needs

We understand that different markets have different requirements. That is why Mettlead offers flexible OEM and ODM services for the Differential Assy AZ9231320271 and other drivetrain components:

• 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 packaging to strengthen your market presence.
• Custom Specifications – Need a modified gear ratio or alternative material grade? Our engineering team can discuss feasibility for bulk orders.
• Factory Visits Welcome – We encourage procurement teams to visit our production facilities in China to inspect quality processes firsthand.

From initial inquiry to final delivery, our team works closely with you to ensure every detail meets your expectations. We offer flexible and secure payment methods, along with reliable international shipping to get parts to your warehouse quickly.

Frequently Asked Questions – Differential Assy AZ9231320271 Sinotruk

What exactly does the Differential Assy AZ9231320271 do in a Sinotruk HOWO truck?

This differential assembly sits within the rear axle housing and serves two essential purposes. First, it allows the left and right drive wheels to spin at different speeds when the vehicle turns — preventing tire scrubbing and drivetrain stress. Second, it transmits torque from the driveshaft to both wheels, ensuring the truck maintains forward momentum under load.

How do I confirm that AZ9231320271 is the correct part number for my vehicle?

The most reliable method is to check your vehicle’s original parts catalog or the nameplate on your existing rear axle assembly. If you are unsure, simply send us your truck model, year, and VIN number, and our technical team will verify compatibility for you.

What are common signs that a differential assembly needs replacement?

Typical symptoms include unusual whining or grinding noises from the rear axle, excessive vibration at highway speeds, uneven tire wear on the drive axle, or visible oil leakage from the differential housing. If you notice any of these, inspecting the differential assembly should be a priority to prevent further drivetrain damage.

Is this differential assembly identical to the original Sinotruk factory part?

Yes, the Differential Assy AZ9231320271 we supply is manufactured to OEM-equivalent standards. It matches the original dimensions, material specifications, gear tooth profiles, and load ratings — ensuring a seamless, bolt-on replacement without any modifications required.

How should I store this differential assembly before installation?

Keep the assembly in its original packaging in a dry, ventilated environment away from direct sunlight and moisture. The anti-corrosion coating protects the component during transit and short-term storage, but prolonged exposure to humidity can degrade seals and bearing surfaces over time.

Can I order this part in bulk for my spare parts inventory?

Absolutely. We support bulk orders with competitive volume pricing. Whether you need 5 units or 500, we can accommodate your requirements with flexible lead times. Contact us with your quantity needs for a tailored quotation.

Get Your Differential Assy AZ9231320271 Quote Today

Downtime costs money — and the longer your trucks sit idle waiting for parts, the more revenue you lose. At Mettlead, we combine factory-direct pricing with fast, reliable global shipping so you can keep your fleet running without breaking your budget.

Here is how to get started:

1. Contact us with your part number (AZ9231320271), required quantity, and delivery destination.
2. Receive a detailed quotation within 24 hours — including unit price, lead time, and shipping options.
3. Confirm your order with flexible, secure payment methods.
4. Track your shipment and receive your parts at your door.

Browse our complete Sinotruk truck parts catalog for additional components, or explore our rear axle parts category for related drivetrain assemblies. Whatever your fleet needs, Mettlead is your trusted partner for quality Chinese heavy truck parts worldwide.