Product Introduction

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

• Structure & Material: Made from high-strength cast iron, it features precision-machined internal surfaces for bearing and shaft alignment, external mounting points for auxiliary components, and sealing surfaces to retain gear oil.

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

• 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 gear train, shafts, and synchronizers, ensuring precise alignment and stability.

2. Component Mounting: Offers secure mounting points for shift forks, bearings, and other internal components, as well as external sensors and actuators.

3. Sealing & Protection: Encloses the transmission’s internal components, protecting them from dirt and debris while retaining gear oil for lubrication and cooling.

Transmission Middle Shell AZ2203010101 for SINOTRUK HW Series Gearbox – Factory Direct Supply

When your heavy-duty truck demands peak drivetrain performance, the Transmission Middle Shell AZ2203010101 stands as the structural backbone of the entire SINOTRUK HW series gearbox assembly. Engineered to withstand extreme torque loads and harsh operating conditions, this gearbox middle housing ensures precise gear alignment, smooth power transfer, and long-lasting durability. At Mettlead, we deliver this critical SINOTRUK HW series gearbox component directly from our factory in China — giving you unbeatable pricing, reliable quality, and fast global shipping.

Key Features and Benefits of the Transmission Middle Shell AZ2203010101

The Transmission Middle Shell AZ2203010101 isn’t just a housing — it’s the precision-engineered core that holds your entire HW gearbox together. Here’s why fleet operators and distributors across the globe trust this component:

• OEM-Grade Dimensional Accuracy: Manufactured to exact SINOTRUK factory specifications, ensuring a seamless fit without costly modifications or machining.
• High-Strength Cast Iron Construction: Built from premium-grade cast iron alloy that resists cracking under extreme torque loads and thermal cycling.
• Precision Bore Alignment: Every bearing seat and shaft bore is CNC-machined to tight tolerances, which guarantees smooth gear engagement and minimizes transmission noise.
• Corrosion-Resistant Surface Treatment: A protective coating shields the middle shell from moisture, road salts, and chemical exposure — extending service life considerably.
• Reduced Downtime: Direct OEM replacement means your technicians can install this part quickly and get vehicles back on the road faster.
• Cost-Effective Factory Direct Pricing: By sourcing directly from Mettlead, you eliminate middleman markups and protect your profit margins.

In short, this transmission middle shell delivers the reliability your fleet needs and the cost savings your business demands. Explore our full range of gearbox parts and SINOTRUK HOWO gearbox components for complete transmission solutions.

Technical Specifications – Transmission Middle Shell AZ2203010101

Accuracy matters when you’re sourcing transmission components. Below, you’ll find the detailed technical parameters for this SINOTRUK HW series gearbox middle shell:

Application Scenarios – Compatible Vehicle Models

The Transmission Middle Shell AZ2203010101 is specifically designed to fit the SINOTRUK HW series gearbox, which is widely used across multiple heavy-duty truck platforms. If your fleet includes any of the following models, this middle shell is built for your application:

• SINOTRUK HOWO A7 – Long-haul logistics and heavy cargo transport
• SINOTRUK HOWO 371 / 375 / 380 – Mining, construction, and bulk material haulage
• SINOTRUK SITRAK C7H / T7H – Premium highway tractors and heavy-duty tippers
• SINOTRUK HOWO T5G / T7H – Regional distribution and special-purpose vehicles
• Other vehicles equipped with HW15710 / HW19710 series transmissions

Whether your trucks are hauling construction aggregates across African roads, transporting goods through Southeast Asian highways, or working in Middle Eastern oilfields, this gearbox middle housing handles it all. Visit our SINOTRUK HOWO truck parts catalog to discover the full range of compatible spares.

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

At Mettlead, we understand that every distributor and fleet operator has unique branding and packaging requirements. That’s exactly why we offer flexible OEM/ODM services for the Transmission Middle Shell AZ2203010101 and our entire gearbox parts range:

• White-Label Packaging: We produce and pack under your own brand identity — helping you build market recognition in your region.
• Custom Packaging Design: Need specific box sizes, labeling languages, or barcode formats? We accommodate your specifications.
• Strict Quality Control: Every single middle shell undergoes dimensional inspection, surface defect detection, and material hardness testing before shipment.
• Bulk Order Flexibility: Whether you need 10 pieces or 1,000, our production capacity scales to meet your demand without compromising lead times.
• Factory Visit Welcome: We openly invite partners to visit our facilities in China, inspect our production lines, and verify quality standards firsthand.

When you partner with Mettlead, you’re not just buying a part — you’re gaining a reliable supply chain ally who understands the demands of the global truck parts aftermarket.

Customer Case Study – Transmission Middle Shell AZ2203010101 in Action

Earlier this year, a major truck parts distributor based in East Africa reached out to Mettlead with an urgent need. Their fleet maintenance clients were experiencing frequent gearbox failures on SINOTRUK HOWO trucks operating in mining regions. The root cause? Inferior aftermarket transmission middle shells that couldn’t handle sustained vibration and heavy torque.

After switching to our Transmission Middle Shell AZ2203010101 for the SINOTRUK HW series gearbox, the results spoke for themselves. Gearbox failure rates dropped by over 40% within three months. The distributor subsequently placed a recurring quarterly order for 200 units, along with other SINOTRUK HW series gearbox components including input shafts, synchronizer assemblies, and gear sets.

Today, they remain one of our most valued partners — proof that quality parts build lasting business relationships. If you’re facing similar challenges with gearbox reliability, we’re ready to support you with the same level of commitment.

Frequently Asked Questions – Transmission Middle Shell AZ2203010101

What exactly does the transmission middle shell do in the HW series gearbox?

Think of the middle shell as the structural skeleton of your gearbox. It houses and aligns the main shaft, countershaft, and synchronizer assemblies. Without a precisely machined middle shell, gears won’t mesh correctly — leading to noise, vibration, and premature component wear. The AZ2203010101 transmission middle shell maintains all internal components in perfect alignment under extreme loads.

Is this transmission middle shell an original SINOTRUK part or an aftermarket replacement?

Mettlead supplies OEM-equivalent aftermarket parts manufactured to the exact same dimensional and material specifications as the original SINOTRUK component. Every Transmission Middle Shell AZ2203010101 passes rigorous quality inspections to ensure drop-in fitment and performance parity with the factory original.

How can I verify that AZ2203010101 is the correct part number for my gearbox?

You can cross-reference the part number stamped on your existing middle shell. Alternatively, provide us with your gearbox model number (e.g., HW15710, HW19710) and vehicle chassis number — our technical team will confirm compatibility within 24 hours.

What causes a transmission middle shell to fail or require replacement?

Common causes include prolonged overloading, inadequate lubrication leading to bearing seizure, external impact damage from road debris, and metal fatigue from high-mileage operation. Cracks, warping, or bore wear in the middle shell will compromise entire gearbox function and should be addressed immediately.

Do you offer other HW series gearbox components alongside the middle shell?

Absolutely. Mettlead carries a comprehensive catalog of SINOTRUK HW series gearbox parts — from input/output shafts and gears to synchronizer rings, bearings, seals, and complete housing assemblies. Bundling orders helps reduce your shipping costs per unit.

What is the typical lead time and shipping arrangement?

For stock items, we typically dispatch within 3–5 business days. Custom or large-volume orders may require 15–25 days for production. We ship worldwide via sea freight, air freight, or express courier depending on urgency and volume. Our logistics team handles all export documentation.

Ready to Secure Your Supply of Transmission Middle Shell AZ2203010101?

Your trucks don’t wait — and neither should your parts supply. Whether you need a single Transmission Middle Shell AZ2203010101 for an urgent repair or a bulk order of SINOTRUK HW series gearbox components for your warehouse, Mettlead delivers factory-direct quality at prices that protect your bottom line.

Here’s how to get started:

1. Send us your inquiry — include the part number, quantity, and your shipping destination.
2. Receive your quotation — we respond within 24 hours with pricing, lead time, and payment options.
3. Confirm and ship — once payment is secured, we pack, inspect, and dispatch your order with full tracking.

Contact us now to request a competitive quote on the Transmission Middle Shell AZ2203010101 — or any other SINOTRUK, HOWO, SHACMAN, FAW, or WEICHAI truck parts you need. Let Mettlead be your trusted China-based truck parts partner.