Product Introduction

This range gear synchronizer gear seat is a precision-forged component, manufactured from high-strength alloy steel to withstand the high torque loads and dynamic stresses of heavy-duty transmission operation. It features a robust, ring-shaped design with internal splines for connection to the main shaft and external teeth for engagement with the synchronizer sleeve. The component undergoes strict heat treatment and surface finishing processes, including carburizing and quenching, to ensure exceptional wear resistance, dimensional accuracy, and fatigue strength. Its precision-machined splines and teeth ensure perfect alignment and smooth meshing with the synchronizer sleeve and main shaft, minimizing noise, vibration, and power loss during operation.

Core Function

• Serves as the primary mounting interface for the range gear synchronizer sleeve, connecting it to the main shaft and enabling the transfer of torque between the synchronizer and the main shaft.

• Provides the external tooth profile that engages with the synchronizer sleeve, allowing for smooth and seamless engagement and disengagement of the high/low range gears.

• Maintains precise alignment of the synchronizer sleeve, ensuring accurate meshing with the range gears and preventing premature wear of the synchronizer and gears.

• Withstands the high torque loads and repeated mechanical stresses of gear shifting, providing consistent performance and extended service life in heavy-duty operation.

• Directly interchangeable with the original factory part, ensuring a precise fit and consistent performance within the transmission assembly.

Range Gear Syn. Gear Seat WG2210100007 – SINOTRUK HW Series Gearbox Parts

When your SINOTRUK HW series gearbox demands precise synchronization and smooth range shifting, the Range Gear Syn. Gear Seat WG2210100007 stands as the critical component that keeps everything running in harmony. This synchronizer gear seat is purpose-built for the auxiliary box of SINOTRUK HW transmissions, ensuring reliable power transfer under the most demanding operating conditions. Whether you’re restocking your warehouse or fulfilling urgent fleet maintenance orders, Mettlead delivers this essential gearbox part at genuine factory-direct pricing — so your margins stay healthy while your customers stay on the road.

Key Features and Benefits of the Range Gear Syn. Gear Seat WG2210100007

This synchronizer gear seat does more than simply “fit.” It performs. Here’s exactly what makes the WG2210100007 a smart investment for wholesale distributors and aftermarket resellers:

• Precision-Engineered Tooth Profile: The gear seat features a meticulously machined spline and tooth geometry that matches OEM specifications, ensuring seamless meshing with the synchronizer assembly inside the HW series auxiliary gearbox.
• Superior Material Hardness: Manufactured from high-grade alloy steel with carburizing and quenching heat treatment, the WG2210100007 delivers outstanding wear resistance and fatigue strength — even under heavy torque loads typical of SINOTRUK HOWO heavy-duty trucks.
• Smooth Synchronization Performance: By maintaining tight dimensional tolerances, this gear seat enables the synchronizer cone to engage cleanly, reducing shift shock and protecting adjacent gearbox components from premature wear.
• Extended Service Life: Strict quality control throughout the production process means fewer warranty returns and happier end customers — a direct boost to your reputation as a reliable parts supplier.
• Direct OEM Replacement: Part number WG2210100007 is a drop-in replacement with no modifications required, which simplifies your inventory management and speeds up workshop turnaround times.

In short, when you stock the Range Gear Syn. Gear Seat WG2210100007, you’re offering your customers a component that protects the entire synchronizer system while delivering the shifting precision that SINOTRUK drivers expect.

Technical Specifications – WG2210100007 Range Gear Synchronizer Gear Seat

Accuracy matters in gearbox parts sourcing. Below you’ll find the essential parameters for the Range Gear Syn. Gear Seat WG2210100007, so you can confidently match it to your customer’s application:

If you need additional dimensional data — such as inner spline count, outer diameter, or hub width — our technical team can provide detailed drawings upon request. Simply contact us with your requirements.

Application Scenario: Where Does the WG2210100007 Gear Seat Work?

The Range Gear Syn. Gear Seat WG2210100007 is specifically designed for the auxiliary box (range section) of SINOTRUK HW series heavy-duty transmissions. In practical terms, here’s where this component comes into play:

• SINOTRUK HOWO Heavy-Duty Trucks: Including tractor heads, dump trucks, and cargo trucks equipped with HW19710/HW19712 gearboxes operating on long-haul routes and construction sites across Africa, the Middle East, Southeast Asia, and South America.
• SITRAK C7H / T7H Premium Heavy Trucks: Fleet operators running SITRAK vehicles with HW series transmissions rely on this gear seat for dependable high-low range shifting under maximum payload conditions.
• Aftermarket Gearbox Overhaul: Transmission repair workshops performing full rebuilds of SINOTRUK HW gearboxes consistently replace the synchronizer gear seat to restore factory-level shifting quality.

Whenever the range synchronizer system shows signs of difficult shifting, grinding noises during high-low range engagement, or abnormal wear on the synchronizer ring, the WG2210100007 gear seat should be inspected and replaced as part of a comprehensive auxiliary box service.

Explore our full catalog of gearbox parts and SINOTRUK HOWO gearbox parts to find matching synchronizer rings, sliding sleeves, and other auxiliary box components.

OEM/ODM Capabilities and Wholesale Advantages

As a dedicated distributor or workshop owner, you need more than just parts — you need a sourcing partner that understands your business. Here’s what Mettlead brings to the table for wholesale buyers of the Range Gear Syn. Gear Seat WG2210100007:

• Factory-Direct Pricing: We source directly from certified manufacturing facilities in China, eliminating middlemen and passing the savings on to you. This means stronger margins on every WG2210100007 unit you sell.
• White-Label and Custom Packaging: Want to build your own brand in your market? We offer neutral or customized packaging options, so you can present these gearbox parts under your company name with full professional branding.
• Flexible MOQ: Whether you’re testing a new market with a small trial order or loading a full container for your distribution network, we accommodate flexible minimum order quantities tailored to your business stage.
• Strict Quality Control: Every batch undergoes 100% dimensional inspection, hardness testing, and visual examination before shipment. We provide material certificates and inspection reports upon request.
• Fast and Reliable Delivery: With well-organized warehouse stock and established logistics partnerships, we ensure your orders ship promptly — keeping your inventory moving and your customers satisfied.
• Secure Payment Options: We support T/T, L/C, Western Union, and other flexible payment methods. All transactions are handled through formal, transparent channels.

We also welcome factory visits. If you’d like to see our operations firsthand and discuss a long-term cooperation plan, our team is ready to host you. Browse more SINOTRUK HOWO truck parts from our extensive product range.

Customer Case Study: Bulk Supply of WG2210100007 to East African Distributor

Earlier this year, a well-established truck parts distributor based in Nairobi, Kenya reached out to Mettlead seeking a reliable supply of Range Gear Syn. Gear Seat WG2210100007 for their growing network of SINOTRUK HOWO service workshops across East Africa.

Their previous supplier had been delivering inconsistent quality — some batches of the synchronizer gear seat showed dimensional deviations that led to premature wear and customer complaints. After receiving samples from Mettlead and conducting fit-testing on HW19710 gearboxes in their workshop, they confirmed that our WG2210100007 met full OEM-equivalent standards.

The result? They placed an initial order of 200 pieces, followed by a recurring quarterly order of 500 units. With our white-label packaging solution, they now sell the Range Gear Syn. Gear Seat WG2210100007 under their own brand while enjoying factory-direct pricing that improved their per-unit margin by over 18%. Zero warranty returns have been reported across the first three shipments.

This is the kind of partnership we build at Mettlead — quality you can trust, pricing that protects your profit, and service that keeps your supply chain running smoothly.

Frequently Asked Questions – WG2210100007 Synchronizer Gear Seat

What exactly is the function of the Range Gear Syn. Gear Seat WG2210100007 inside the gearbox?

The synchronizer gear seat (also called a synchronizer hub) serves as the central mounting element within the range synchronizer assembly of the HW series auxiliary box. It sits on the output shaft and carries the synchronizer sleeve, enabling smooth engagement between high and low range gears. Without a properly functioning gear seat, the synchronizer cannot align rotational speeds correctly, leading to harsh shifting or gear clash.

How can I tell if the WG2210100007 gear seat needs replacement?

Common symptoms include grinding or crunching noises when shifting between high and low range, difficulty engaging range gears, or visible wear and chipping on the spline teeth during gearbox disassembly. If the synchronizer ring shows uneven contact patterns, the gear seat surface should be inspected for wear beyond acceptable tolerances.

Is the WG2210100007 from Mettlead an OEM part or aftermarket?

Mettlead supplies OEM-equivalent aftermarket parts. The Range Gear Syn. Gear Seat WG2210100007 is manufactured to match original equipment dimensional and material specifications, ensuring a direct drop-in fit. It undergoes the same carburizing, quenching, and precision machining processes used in OEM production.

Which other gearbox components should I replace alongside the WG2210100007?

When servicing the auxiliary box synchronizer assembly, it’s best practice to also inspect and replace — if worn — the synchronizer ring, sliding sleeve, spring pins, and thrust washers. Replacing these components together ensures optimal synchronization performance and prevents repeat failures.

Can I order the WG2210100007 with my own brand packaging?

Absolutely. Mettlead offers white-label and custom packaging services. You can supply your logo, brand name, and packaging design, and we’ll package each Range Gear Syn. Gear Seat WG2210100007 accordingly. This is particularly popular among distributors building their own aftermarket parts brand in their local market.

What is the minimum order quantity for wholesale pricing?

MOQ varies depending on your overall order volume and packaging requirements. For standard neutral packaging, we can accommodate smaller trial orders. For custom-branded packaging, a slightly higher MOQ may apply. Contact us with your quantity needs and we’ll provide a tailored quote.

Ready to Stock the WG2210100007? Let’s Talk.

You’ve seen the specs. You understand the quality. Now it’s time to secure your supply of the Range Gear Syn. Gear Seat WG2210100007 at factory-direct pricing that protects your bottom line.

Whether you need 50 pieces or 5,000, Mettlead is your dedicated sourcing partner for SINOTRUK HW series gearbox parts. We respond to inquiries within 24 hours, provide detailed quotations with shipping options, and support you from first order to long-term cooperation.

Take the next step:

• Request a wholesale quote for WG2210100007
• Ask about custom packaging and branding options
• Inquire about combination orders with other SINOTRUK HOWO gearbox parts

Contact us now and let’s build a profitable partnership — one gearbox part at a time.