Product Introduction

This heavy-duty rear shell is the main structural housing for the transmission’s rear section, engineered to withstand the high torque and vibration of heavy-duty commercial vehicle operations.

• Structure & Material: Made from high-strength cast iron, it features a precision-machined bore for the output shaft bearing, a mating surface for the transmission middle shell, and mounting points for the driveline and auxiliary components.

• Performance: The rigid cast iron construction ensures exceptional structural integrity, while precision-machined surfaces guarantee leak-free sealing and accurate alignment of the output shaft.

• Durability: The robust cast iron resists deformation, cracking, and wear, providing a long service life even under extreme loads and harsh operating conditions.

• Compatibility: Direct OE replacement, fully matching the mounting points and dimensional specifications of the HW19710 transmission.

Core Function

1. Structural Support: Provides the main housing for the transmission’s output shaft and its supporting bearings, ensuring precise alignment and stability.

2. Driveline Connection: Forms the interface between the transmission and the vehicle’s driveline, enabling efficient torque transfer to the wheels.

3. Component Mounting: Offers secure mounting points for speed sensors, driveline components, and other auxiliary transmission parts.

Transmission Rear Shell AZ2220100105 – SINOTRUK HW Series Gearbox Replacement Part

When your SINOTRUK HW series gearbox needs a reliable rear shell replacement, precision matters more than anything else. The Transmission Rear Shell AZ2220100105 is engineered to restore your heavy-duty truck’s drivetrain performance to factory standards. Manufactured with strict quality control and sourced directly from our facility in China, this gearbox rear shell delivers the exact fit, durability, and structural integrity that fleet operators and repair workshops demand worldwide.

At Mettlead, we specialize in supplying genuine-quality SINOTRUK truck parts to procurement managers who need competitive pricing without compromising on reliability. Whether you are maintaining a single vehicle or managing an entire fleet, this transmission rear shell keeps your HW series gearbox running smoothly under the toughest operating conditions.

Key Features and Benefits of the Transmission Rear Shell AZ2220100105

Choosing the right transmission rear shell is critical because it houses and protects the internal components of your gearbox. Here is why this particular part stands out in the market:

• OEM-Grade Precision: The AZ2220100105 rear shell is manufactured to match original SINOTRUK specifications, ensuring seamless installation without any modification.
• Superior Material Strength: Cast from high-grade aluminum alloy, this shell offers excellent heat dissipation and corrosion resistance while keeping overall weight manageable.
• Extended Service Life: Thanks to rigorous quality control processes, this transmission rear shell withstands continuous vibration, thermal cycling, and mechanical stress over hundreds of thousands of kilometers.
• Perfect Seal Integrity: Precision-machined mating surfaces ensure a tight seal against oil leaks, protecting internal gears and bearings from contamination.
• Factory-Direct Pricing: By sourcing directly from Mettlead, you eliminate unnecessary middlemen and secure the best possible cost per unit for your procurement budget.
• Fast Global Shipping: We maintain ready stock of popular SINOTRUK gearbox components, which means shorter lead times and quicker turnarounds for your maintenance schedules.

Technical Specifications – SINOTRUK HW Gearbox Rear Shell

Below you will find the detailed parameters for the Transmission Rear Shell AZ2220100105. These specifications help you verify compatibility and plan your installation accordingly:

Application Scenarios – Where Does This Rear Shell Fit?

The Transmission Rear Shell AZ2220100105 is specifically designed for the SINOTRUK HW series gearbox family. In practice, this means it serves a wide range of heavy-duty commercial vehicles across multiple industries. Here are the most common application scenarios:

Compatible Vehicle Models

• SINOTRUK HOWO A7 – Heavy-duty tractor units equipped with HW19710/HW19712 transmissions
• SINOTRUK HOWO T7H – Long-haul logistics trucks with HW series gearboxes
• SINOTRUK SITRAK C7H – Premium heavy trucks utilizing HW automated transmissions
• SINOTRUK STEYR Series – Construction and mining dump trucks with HW gearbox configurations
• SINOTRUK HOWO Dump Trucks – Off-road and on-road tipper vehicles for quarry and infrastructure projects

Typical Use Cases

Fleet maintenance workshops frequently replace the transmission rear shell when they detect oil seepage at the gearbox housing seam, cracking due to impact damage, or thread wear on mounting bolt holes. Additionally, gearbox overhaul programs often require a fresh rear shell to guarantee long-term sealing performance after internal components have been rebuilt.

Explore our full range of gearbox transmission parts and SINOTRUK HOWO gearbox components to find all the parts you need for a complete overhaul.

OEM/ODM Capability – Custom Packaging and White-Label Solutions

We understand that different markets have different branding needs. That is why Mettlead offers flexible OEM and ODM services for the Transmission Rear Shell AZ2220100105 and all our SINOTRUK HOWO truck parts:

• White-Label Packaging: Receive parts in neutral boxes with no branding, so you can apply your own labels and build your local brand identity.
• Custom Packaging: We can print your company logo, part number reference, and barcode on the packaging to streamline your warehouse management.
• Bulk Order Flexibility: Whether you need 10 pieces or 1,000, our production capacity scales with your demand without sacrificing quality or delivery timelines.
• Strict Quality Control: Every transmission rear shell undergoes dimensional inspection, surface quality checks, and pressure testing before it leaves our facility.

Customer Case Study – AZ2220100105 Transmission Rear Shell in Action

In early 2024, a fleet management company based in East Africa reached out to Mettlead with an urgent requirement. They operated over 80 SINOTRUK HOWO dump trucks in a mining region, and multiple units were experiencing oil leaks from deteriorated transmission rear shells on their HW series gearboxes.

After verifying the part number AZ2220100105, our team shipped 25 units of the SINOTRUK HW series gearbox rear shell within 7 working days. The client’s workshop technicians confirmed that every piece matched the original transmission rear shell dimensions perfectly, and installation was completed without any machining or adaptation.

Within three months, the customer reported zero gearbox oil leak incidents on the replaced units. Consequently, they placed a follow-up order for 40 additional pieces along with other SINOTRUK gearbox accessories. This case demonstrates how sourcing a genuine-quality Transmission Rear Shell AZ2220100105 directly from a trusted supplier translates into real operational savings and reduced downtime.

Frequently Asked Questions – Transmission Rear Shell AZ2220100105

What is the function of the transmission rear shell in a SINOTRUK HW gearbox?

The transmission rear shell serves as the main structural housing for the rear section of the HW series gearbox. It encases the output shaft, bearings, and synchronizer assemblies while providing a sealed environment that retains gear oil. Essentially, without a properly sealed rear shell, your gearbox would lose lubrication and suffer accelerated wear on all internal components.

How do I confirm that AZ2220100105 fits my specific SINOTRUK truck model?

The most reliable way is to check the part number stamped on your existing transmission rear shell. If it reads AZ2220100105, then this replacement is a direct fit. Alternatively, you can provide your truck’s VIN or gearbox model number (such as HW19710 or HW19712), and our technical team will verify compatibility for you.

What causes the transmission rear shell to fail or need replacement?

Common failure modes include hairline cracks caused by road vibration and thermal cycling, oil seepage along the mating surface due to warping over time, and stripped bolt threads from repeated maintenance. In harsh operating environments like mining sites, impact damage from flying debris can also necessitate replacement of the rear shell.

Is this AZ2220100105 rear shell an OEM-quality replacement or aftermarket?

This transmission rear shell is manufactured to OEM specifications using the same materials and dimensional tolerances as the original factory part. While it is produced by our partner facility rather than the original equipment manufacturer, it meets all the standards required for direct replacement without any modification.

Can I order a single piece of the Transmission Rear Shell AZ2220100105, or is there a minimum?

Absolutely, you can order as few as one piece. However, we offer attractive volume discounts for bulk purchases. Many of our procurement clients order in batches of 10 or more to reduce per-unit shipping costs and maintain spare parts inventory.

How should I store the transmission rear shell before installation?

Keep the rear shell in its original packaging in a dry, ventilated area away from direct sunlight and moisture. Avoid stacking heavy items on top of the package, as the machined mating surfaces are precision-finished and must remain flat for proper sealing during installation.

Get a Competitive Quote for the Transmission Rear Shell AZ2220100105

Ready to secure factory-direct pricing on the SINOTRUK HW Series Gearbox Transmission Rear Shell AZ2220100105? Our team at Mettlead responds to inquiries within 24 hours with detailed pricing, lead times, and shipping options tailored to your location.

Whether you need a single replacement unit or a bulk order for your warehouse, we are here to support your procurement goals with reliable quality and transparent communication.

Contact us now to request a quotation, ask technical questions, or schedule a factory visit. Let Mettlead be your trusted partner for all SINOTRUK gearbox parts and heavy truck components.