Product Introduction

• Structure: Forged via precision closed-die forging from high-strength 20CrMnTi alloy steel. Features an external involute tooth profile designed exclusively for meshing with the reverse idler gear. The inner bore is machined with a single rectangular positioning keyway(not splines or notches) for circumferential anti-slip fixation during press-fit installation, with no internal splines—this is a key structural difference from forward gears on the same shaft. T

• Performance: The keyway-based positioning eliminates gear slippage during heavy-load reverse maneuvers (e.g., uphill backing with full cargo). Precision-ground teeth ensure smooth meshing with the idler gear, reducing reverse operation noise by approximately 15% compared to standard gears.

Core Function

1. Reverse power transmission: Transmits engine torque from the input shaft to the reverse idler gear (WG2210050001), acting as the sole power-transferring reverse gear on the HW25712 input shaft.

2. Rotation direction reversal: Meshes with the reverse idler gear to reverse the direction of power rotation by 180°, enabling the vehicle to move in reverse.

3. Heavy-load reverse capability: Delivers stable torque for heavyload reverse operations (e.g., construction site backing, full-cargo maneuvering) without gear slippage or deformation.

Input Shaft Reverse Gear AZ2210040207 – SINOTRUK HW Series Gearbox Replacement Part

When your SINOTRUK HW series gearbox demands a reliable reverse gear replacement, the Input Shaft Reverse Gear AZ2210040207 delivers the precision-engineered performance your fleet depends on. Designed to meet OEM specifications, this gearbox component ensures smooth reverse engagement, reduced noise, and extended service life — even under the harshest operating conditions. Whether you are restocking your warehouse or fulfilling urgent client orders, Mettlead supplies this critical transmission part at factory-direct prices with fast, dependable delivery worldwide.

Why Choose the Input Shaft Reverse Gear AZ2210040207 for SINOTRUK HW Gearbox?

The reverse gear on an input shaft endures constant meshing forces every time a heavy-duty truck backs up under load. That is precisely why quality matters here more than almost anywhere else in the drivetrain. Here is what sets this part apart:

• OEM-Grade Precision: Manufactured to match the original SINOTRUK HW gearbox tolerances, so the AZ2210040207 reverse gear slots in without modification or shimming.
• Heat-Treated Alloy Steel: The gear teeth undergo carburizing and quenching processes, resulting in a hardened surface that resists pitting and wear while maintaining a tough, shock-absorbing core.
• Noise Reduction Geometry: Optimized tooth profile minimizes gear whine and vibration during reverse engagement, protecting adjacent bearings and synchronizer components.
• Extended Service Life: Rigorous fatigue testing confirms this input shaft reverse gear can withstand repeated high-torque reversing cycles typical of mining, construction, and logistics applications.
• Drop-In Compatibility: Directly replaces the original AZ2210040207 part number — no adapter kits, no guesswork.

Application Scenarios – Where Does the AZ2210040207 Reverse Gear Fit?

This Input Shaft Reverse Gear AZ2210040207 is specifically engineered for the SINOTRUK HW series gearbox, one of the most widely deployed heavy-duty transmissions across Africa, Southeast Asia, the Middle East, and South America. More specifically, it serves as the input shaft reverse gear inside HW19710, HW19712, and related HW-series transmission models.

You will typically find this part at work in the following vehicle platforms:

• SINOTRUK HOWO A7 6×4 and 8×4 dump trucks
• SINOTRUK HOWO tractor heads used in long-haul logistics
• SITRAK C7H heavy-duty trucks equipped with HW series transmissions
• Mining and construction vehicles requiring frequent reverse maneuvering under full payload

Whenever a driver shifts into reverse, this gear bridges the input shaft rotation to the output shaft in the opposite direction. In demanding environments — think crowded loading docks, steep mine ramps, and tight construction sites — the AZ2210040207 reverse gear must perform flawlessly thousands of times without failure. That reliability is exactly what this part delivers.

Looking for more transmission components? Browse our full gearbox parts category or explore our dedicated SINOTRUK HOWO gearbox parts collection for matching shafts, synchronizers, and bearings.

Technical Specifications – Input Shaft Reverse Gear AZ2210040207

Features and Benefits for Wholesale Distributors

As a wholesale agent or regional distributor, you need more than just a quality part — you need a supplier partnership that protects your margins and keeps your shelves stocked. Here is how Mettlead supports your business goals with the Input Shaft Reverse Gear AZ2210040207 for SINOTRUK HW Series Gearbox:

1. Factory-Direct Pricing: Because we source directly from certified manufacturing facilities in China, you bypass middlemen and enjoy competitive per-unit costs — even at moderate order quantities.
2. Strict Quality Control: Every batch of AZ2210040207 reverse gears passes dimensional inspection, hardness testing, and surface finish verification before leaving the warehouse.
3. White-Label and Custom Packaging: Build your own brand identity. We offer neutral boxes, private-label printing, and custom packaging designs to suit your regional market positioning.
4. Complete Gearbox Parts Catalog: Rather than juggling multiple suppliers, consolidate your orders. Mettlead stocks input shafts, output shafts, counter shafts, synchronizer rings, bearings, and more for the entire HW transmission family.
5. Fast and Reliable Delivery: We maintain ready-stock inventory for high-demand items and coordinate efficient sea and air freight to get parts to your door on schedule.
6. Flexible Payment Options: From T/T and L/C to trade assurance — we work with you to find the safest, most convenient payment channel for your region.

Explore the full range of SINOTRUK HOWO truck parts and spare parts available through Mettlead.

OEM/ODM Capability

Mettlead understands that different markets have different requirements. That is why we offer flexible manufacturing partnerships beyond standard off-the-shelf supply:

• OEM Supply: We replicate the exact AZ2210040207 specifications — dimensions, material composition, heat treatment profile — so the part performs identically to the original SINOTRUK component.
• ODM Customization: Need a modified tooth count, alternative material grade, or special coating for extreme-climate applications? Our engineering team collaborates with you to develop custom solutions.
• Private Labeling: Your brand, your packaging, your market. We print logos, apply labels, and design boxes to your exact brief.
• Sample Testing: Before committing to a bulk order, request samples of the Input Shaft Reverse Gear AZ2210040207 for fitment and performance validation in your workshop.

Additionally, we welcome distributor visits to our facilities in China. Seeing our production lines, quality labs, and warehousing firsthand gives you confidence in the long-term reliability of our supply chain.

Customer Case Study – Input Shaft Reverse Gear AZ2210040207 Bulk Order Success

A regional truck parts distributor in East Africa was experiencing frequent gearbox-related returns from their workshop clients. After investigation, they traced the failures to low-quality aftermarket reverse gears that wore out prematurely in the SINOTRUK HW series gearboxes common throughout their fleet base.

They reached out to Mettlead seeking a dependable source for the Input Shaft Reverse Gear AZ2210040207 and related SINOTRUK HW gearbox components. After receiving initial samples and conducting fitment tests on a HOWO A7 tractor unit, they confirmed the dimensional accuracy and surface hardness matched OEM standards.

Within three months of switching to Mettlead-supplied AZ2210040207 reverse gears, the distributor reported:

• A 72% reduction in warranty claims related to reverse gear failure
• 15% improvement in per-unit margin thanks to factory-direct pricing
• Faster reorder fulfillment — repeat shipments dispatched within 5 business days
• Positive feedback from workshop mechanics on installation fit and gear engagement quality

Today, this distributor orders a full range of HW series gearbox parts from Mettlead on a quarterly basis, consolidating their supply chain and strengthening their reputation for quality in the local market.

Frequently Asked Questions – Input Shaft Reverse Gear AZ2210040207

What gearbox models does the AZ2210040207 reverse gear fit?

The Input Shaft Reverse Gear AZ2210040207 is designed specifically for the SINOTRUK HW series gearbox family, including popular models like HW19710 and HW19712. These transmissions are commonly found in HOWO and SITRAK heavy-duty trucks.

Is this reverse gear made from the same material as the original SINOTRUK part?

Yes. The AZ2210040207 is manufactured from carburized alloy steel and undergoes the same quenching and tempering process as the OEM component. Surface hardness falls within HRC 58–62, matching factory specifications for wear resistance and durability.

How can I verify that the AZ2210040207 reverse gear will fit before placing a bulk order?

We recommend ordering samples first. Our team can provide detailed dimensional drawings for cross-referencing, and you are welcome to test-fit the gear in your workshop before committing to volume quantities.

What causes premature failure of the input shaft reverse gear in HW gearboxes?

Common causes include inferior material quality, improper heat treatment, misalignment during installation, and low or contaminated transmission oil. Choosing an OEM-grade replacement like the AZ2210040207 from a verified supplier eliminates the material and manufacturing variables.

Can I order the AZ2210040207 together with other HW gearbox parts in one shipment?

Absolutely. Mettlead stocks a comprehensive range of SINOTRUK HW gearbox components — from input shafts and counter shafts to synchronizer rings and gear forks. Consolidating your order reduces shipping costs and simplifies logistics.

Do you offer custom packaging for the AZ2210040207 reverse gear?

Yes. We provide neutral packaging, white-label options, and fully customized boxes with your brand logo, part number labels, and regional language instructions. This is especially popular among distributors building their own aftermarket brand.

Ready to Secure Your Supply of Input Shaft Reverse Gear AZ2210040207?

Stop losing margin to unreliable suppliers and inconsistent quality. Partner with Mettlead for factory-direct access to the Input Shaft Reverse Gear AZ2210040207 for SINOTRUK HW Series Gearbox — backed by strict quality control, competitive wholesale pricing, and responsive global logistics.

Whether you need 50 pieces or 5,000, our team is ready to prepare a tailored quotation that fits your market and your budget.

Take the next step: Contact us now to request pricing, MOQ details, or free samples of the AZ2210040207 input shaft reverse gear. Let us build a supply partnership that keeps your customers coming back.