Product Introduction

Structure: A robust, four-armed cast iron cross with precision-machined pinion shafts and a central bore for the differential side gears. The spider features a symmetrical design to evenly distribute torque loads across the pinion gears.Performance: Provides rigid support for the differential pinion gears, ensuring smooth meshing with the side gears and efficient torque transmission. The heavy-duty cast iron construction withstands high torque loads and road impacts, while the precision-machined shafts minimize friction and wear.Design: Directly interchangeable with original equipment, engineered to fit perfectly with the differential housing and gear set, maintaining precise alignment and optimal performance.

Core Function

• Pinion Gear Support: Supports the differential pinion gears, ensuring proper meshing with the side gears and efficient torque transmission.

• Torque Distribution: Transmits torque from the differential case to the pinion gears, evenly distributing loads to the drive wheels.

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

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

Differential Spider AZ9231320223 Sinotruk – Premium Cross Shaft for Heavy-Duty Truck Rear Axle

When your heavy-duty Sinotruk fleet depends on reliable power distribution, every component inside the differential matters. The Differential Spider AZ9231320223 is the cross shaft (spider pin) that sits at the heart of the rear axle differential assembly, supporting the planetary gears and ensuring smooth, balanced torque delivery to both drive wheels. Sourced directly from our factory in China, this part meets OEM specifications and is ready to ship worldwide — so your trucks stay on the road, not in the workshop.

Whether you are a fleet maintenance manager in Africa, a spare-parts distributor in Southeast Asia, or a procurement officer sourcing bulk components for Middle Eastern logistics companies, this page gives you everything you need to make a confident purchasing decision.

Key Features and Benefits of Differential Spider AZ9231320223

Engineered for Durability

This differential spider is manufactured from high-strength alloy steel, heat-treated to withstand the extreme torsional loads found in Sinotruk HOWO rear axle assemblies. As a result, it resists premature wear, pitting, and fatigue cracking — even under continuous heavy-load operation.

Precision-Machined for Perfect Fit

Each cross shaft is CNC-machined to tight tolerances, ensuring a snug fit with the planetary gears and differential case. This precision eliminates play and vibration, which in turn extends the service life of surrounding components like thrust washers and side gears.

OEM-Equivalent Quality at Factory-Direct Pricing

Because we supply directly from our manufacturing base, you skip the middlemen. That means you get genuine OEM-grade quality without the inflated price tag — a critical advantage for bulk buyers and cost-conscious procurement managers.

Fast, Reliable Global Delivery

We maintain ready stock of high-demand Sinotruk parts including the AZ9231320223 differential spider. Orders are processed quickly, and we work with trusted freight partners to deliver to your door or port efficiently.

Technical Specifications

Application Scenario

The Differential Spider AZ9231320223 Sinotruk is specifically designed for the following application:

• Compatible Vehicles: Sinotruk HOWO heavy-duty trucks, SITRAK series, and other CNHTC-platform vehicles equipped with the standard rear axle differential.
• Component Role: Acts as the differential cross shaft (spider pin), providing the rotational axis for the planetary (spider) gears inside the differential case.
• Core Function: Supports and locates the planetary gears, enabling them to rotate freely and distribute driving torque evenly between the left and right wheels — especially during cornering, where wheel speed differences must be accommodated smoothly.
• Operating Environment: Designed to perform under high torque loads, elevated temperatures, and continuous vibration typical of long-haul freight, mining haul roads, and construction-site logistics.

In short, without a properly functioning differential spider, your planetary gears cannot rotate correctly, leading to uneven power distribution, excessive tire wear, and ultimately differential failure. Replacing a worn cross shaft promptly protects the entire rear axle assembly.

OEM/ODM Capability

At Mettlead, we understand that different markets have different requirements. That is why we offer flexible OEM and ODM services for the Differential Spider AZ9231320223 and our full range of Sinotruk parts:

• White-Label Packaging: We can ship with neutral packaging so you can apply your own brand identity — ideal for distributors building a regional parts brand.
• Custom Packaging: Need your logo, part numbers, and barcodes printed on the box? We handle that in-house.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface-finish verification before dispatch.
• Factory Visits Welcome: We encourage serious buyers to visit our facility in China to inspect production lines and quality processes firsthand.

Explore our full range of Sinotruk HOWO Truck Parts or browse all available Rear Axle Components in our catalog.

Frequently Asked Questions (FAQ)

What exactly does the Differential Spider AZ9231320223 do inside the axle?

The differential spider — also called a cross shaft or spider pin — serves as the central axis on which the planetary (spider) gears rotate. It sits inside the differential case and allows the spider gears to mesh with the side gears, enabling each drive wheel to turn at a different speed when the truck corners. Without it, the differential cannot function properly.

How do I know when the differential spider needs replacement?

Common signs include unusual clunking or knocking noises from the rear axle during turns, excessive backlash in the differential, visible scoring or wear grooves on the cross shaft surface, and metal debris found in the axle oil during routine maintenance. If you notice any of these symptoms, inspecting the spider should be a priority.

Is this AZ9231320223 cross shaft compatible with all Sinotruk HOWO models?

This part is designed for Sinotruk HOWO and SITRAK vehicles that use the standard CNHTC rear axle differential assembly specifying part number AZ9231320223. However, because Sinotruk produces multiple axle variants, we recommend confirming the OEM part number against your vehicle’s axle nameplate or maintenance manual before ordering. If you are unsure, feel free to contact us with your VIN or axle model and we will verify compatibility.

What material is the differential spider made from, and how is it hardened?

It is forged from high-strength alloy steel, then carburized and heat-treated to achieve a hard, wear-resistant surface while maintaining a tough, shock-absorbing core. This dual-property structure is essential for surviving the cyclic loading inside a heavy-truck differential.

Can I order a small quantity for testing before committing to bulk?

Absolutely. We offer flexible minimum order quantities specifically so that new customers can evaluate quality before scaling up. Reach out to our sales team to discuss sample orders and trial shipments.

Do you supply other differential components that work alongside this spider?

Yes. We carry a comprehensive range of Sinotruk rear axle differential parts — including planetary gears, side gears, thrust washers, differential cases, and bearing kits. You can view our complete Sinotruk Truck Parts catalog for the full selection.

Ready to Order? Let’s Talk.

Getting the right Differential Spider AZ9231320223 Sinotruk at the right price should not be complicated. As your factory-direct partner, Mettlead delivers OEM-quality parts, competitive pricing, and responsive support — all backed by strict quality control.

Here is what to do next:

1. Send us your required quantity and delivery destination.
2. Receive a detailed quotation within 24 hours.
3. Approve the order and choose your preferred secure payment method.
4. We ship — you receive quality parts, on time.

Contact Us Now to request a quote or ask any technical questions. Our team is standing by to support your procurement needs.