Product Introduction

This heavy-duty front shell is the main structural housing for the front section of the transmission, 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 mating surface for the engine flywheel housing, multiple mounting points for sensors and auxiliary components, and integrated supports for bearings and shafts.

• Performance: The rigid cast iron construction ensures exceptional structural integrity, while precision-machined surfaces guarantee leak-free sealing and accurate alignment of the clutch and input 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. Engine Connection: Forms the rigid interface between the transmission and the engine, ensuring precise alignment of the clutch and input shaft for efficient power transfer.

2. Structural Support: Provides the main housing for the front section of the transmission, supporting bearings, shafts, and the clutch mechanism.

3. Component Mounting: Offers secure mounting points for pneumatic shift cylinders, speed sensors, and other auxiliary transmission components.

Transmission Front Shell AZ2220000101 – SINOTRUK HW Series Gearbox

When your heavy-duty truck fleet depends on a reliable drivetrain, every component inside the gearbox matters. The Transmission Front Shell AZ2220000101 is engineered specifically for the SINOTRUK HW Series Gearbox, serving as the critical housing that protects internal gears, bearings, and shafts from contamination, vibration, and premature wear. Sourced directly from our factory in China, this genuine-spec front shell delivers OEM-grade fitment, structural integrity, and long-term durability — all at a competitive wholesale price that protects your margins.

At Mettlead, we supply thousands of transmission parts for China’s leading truck brands. Whether you are a regional distributor restocking fast-moving gearbox components or a fleet workshop replacing a cracked housing, this front shell is built to get trucks back on the road quickly and cost-effectively.

Key Features and Benefits of the Transmission Front Shell AZ2220000101

Precision-Engineered Housing

This transmission front shell is cast and machined to exact OEM dimensional tolerances for the SINOTRUK HW series gearbox. That means bolt patterns, bearing bores, and mating surfaces align perfectly — eliminating costly rework during installation and reducing your customers’ downtime.

High-Strength Material Construction

Manufactured from high-grade cast aluminum alloy, the AZ2220000101 front shell offers an ideal balance between lightweight performance and structural rigidity. It resists cracking under high-torque loads, even when trucks operate in extreme temperature environments or on rough terrain.

Complete Sealing Protection

The front shell provides a fully sealed interface between the engine flywheel housing and the gearbox internals. Properly machined gasket surfaces ensure oil stays in and dust stays out — extending the service life of synchronizers, bearings, and gear sets inside the HW transmission.

Wholesale-Friendly Pricing

Because Mettlead ships directly from the factory, you bypass middlemen and enjoy the most competitive landed cost. This translates into healthier profit margins for distributors and lower repair bills for end-users — a genuine win-win.

Fast Global Shipping

We maintain ready stock of high-demand SINOTRUK gearbox parts, including the AZ2220000101 front shell. Orders typically ship within 3–7 working days, so your supply chain stays lean and responsive.

Technical Specifications

Application Scenarios — Compatible Vehicle Models

The Transmission Front Shell AZ2220000101 is designed to fit the SINOTRUK HW series manual transmission, which is widely installed across the following heavy-duty truck platforms:

• SINOTRUK HOWO A7 — 6×4 tractor and dump truck configurations
• SINOTRUK HOWO T7H — long-haul logistics and heavy-haulage models
• SINOTRUK SITRAK C7H / G7 — premium heavy-duty series
• SINOTRUK HOWO 371 / 375 / 380 HP models — construction and mining fleets
• Other HW gearbox-equipped vehicles — including select SHACMAN and FAW models using the HW transmission under license

If you are unsure about fitment, simply send us your VIN or current part number and our technical team will confirm compatibility within 24 hours. Browse more gearbox components in our dedicated Gearbox Parts Category or explore the full SINOTRUK HOWO Gearbox Parts catalog.

OEM / ODM Capability and Custom Packaging

Mettlead understands that brand presentation matters to distributors. That is why we offer flexible packaging solutions alongside our factory-direct pricing:

• White-Label Packaging — neutral boxes with no branding, ready for your own labels.
• Custom Packaging — your logo, part numbers, and barcodes printed directly on the box for a fully branded experience.
• Bulk Palletized Shipping — optimized crating for container loads, reducing per-unit freight cost.

Every Transmission Front Shell AZ2220000101 passes our strict quality control process, including dimensional inspection, surface-defect scanning, and weight verification, before it leaves the factory floor. We also welcome distributors and importers to visit our facility in China for on-site quality audits.

Discover more genuine-spec parts across our full SINOTRUK HOWO Truck Parts brand page.

Customer Case Study — Transmission Front Shell AZ2220000101 Bulk Order

In early 2024, a truck parts distributor based in East Africa reached out to Mettlead looking for a reliable source of SINOTRUK HW series gearbox components. Their local market had a high concentration of HOWO 371 dump trucks, and the Transmission Front Shell AZ2220000101 was one of their top five fastest-moving SKUs.

After receiving samples and confirming dimensional accuracy against their existing OEM stock, they placed an initial order of 120 units with custom packaging featuring their own brand logo and barcode. We shipped the order within 5 working days via sea freight, and the containers cleared customs smoothly thanks to our detailed packing lists and certificates of origin.

Within three months, the client reordered 200 more units and expanded their purchasing to include input shafts, synchronizer rings, and gearbox rear shells from our SINOTRUK HOWO Gearbox Parts range. Their feedback was straightforward: “Same OEM quality, better price, and faster delivery than our previous supplier.”

Frequently Asked Questions (FAQ)

What exactly does the Transmission Front Shell AZ2220000101 do inside the gearbox?

The front shell serves as the primary housing that encloses the input shaft, main shaft front bearings, and synchronizer assemblies of the HW series gearbox. It also provides the mating flange that bolts directly to the engine flywheel housing, forming a rigid and sealed connection between the engine and transmission. Without a properly machined and undamaged front shell, gear alignment suffers, oil leaks develop, and bearing life shortens dramatically.

How can I confirm this front shell fits my specific HW gearbox variant?

The safest method is to match the OEM part number — AZ2220000101 — with the number stamped or printed on your existing front shell. If the original marking has worn off, provide us with your gearbox assembly model number (e.g., HW19710, HW15710) and we will cross-reference it against our fitment database. You can reach our technical team quickly through our Contact Us page.

Is this an original SINOTRUK part or an aftermarket replacement?

We supply OEM-equivalent quality parts manufactured to the same dimensional and material specifications as the original. Each Transmission Front Shell AZ2220000101 undergoes strict quality control — including CNC bore measurement and surface finish inspection — ensuring it performs identically to the factory-installed component.

What causes a transmission front shell to fail or need replacement?

The most common reasons include impact damage from road debris, hairline cracks caused by chronic vibration or overtightened bolts, corrosion in humid operating environments, and bearing bore wear after high-mileage service. If you notice oil seeping from the bell housing area or hear unusual rattling at idle, inspecting the front shell should be among your first diagnostic steps.

What is the minimum order quantity for wholesale pricing?

MOQ varies depending on whether you need standard or custom packaging. Generally, we offer competitive tiered pricing starting from as few as 10 pieces for the AZ2220000101 front shell. For exact quotes tailored to your volume, contact us with your target quantity and shipping destination.

How is the transmission front shell packaged for export?

Each unit is individually wrapped in anti-corrosion film, cushioned with foam inserts, and placed inside a reinforced carton. For full container orders, we palletize and strap the cartons to prevent shifting during transit. Custom branding on the outer packaging is available at no additional charge for qualifying order volumes.

Ready to Secure Competitive Pricing on the AZ2220000101 Transmission Front Shell?

Getting a quote is simple. Tell us your required quantity, preferred packaging, and shipping destination — and our team will respond with a detailed offer within 24 hours. As a factory-direct supplier of SINOTRUK HW series gearbox parts, Mettlead delivers the quality your customers expect at a price that grows your bottom line.

Contact Us Now to request your wholesale quote, ask a technical question, or schedule a factory visit. Let’s build a reliable supply chain — together.