Product Introduction

• Structure: Precision-forged high-strength alloy steel blank, processed by precision CNC turning and hobbing, with internal involute splines and external gear engagement teeth. The surface adopts carburizing and quenching heat treatment, the tooth surface is precision ground, and the inner spline is coated with anti-wear lubricating coating. The end face is designed with a guide chamfer to ensure smooth engagement with the mating gear

• Performance: The carburized and quenched surface (HRC58-62) has excellent wear resistance and impact resistance, which can withstand the repeated impact force during gear shifting; the precision ground tooth surface ensures zero-clearance meshing, reducing gear shifting noise and vibration; the anti-wear coating of the inner spline reduces the friction resistance with the synchronizer hub, ensuring smooth sliding and no jamming; the integral forging structure has high structural rigidity, no deformation under heavy load

Core Function

1. Gear Shifting Engagement: Driven by the shift fork, the sliding sleeve moves axially along the synchronizer hub, and the external teeth mesh with the gear ring of the mating gear to realize the locking of the synchronizer hub and the gear, completing the gear shifting and power transmission

2. Synchronization Auxiliary Matching: The guide chamfer on the end face of the external teeth cooperates with the synchronizer ring to realize the pre-synchronization of the gear speed before meshing, avoiding gear clash and ensuring smooth gear shifting.

Sliding Sleeve WG7117329081 – Genuine Sinotruk Sitrak Transmission Component

When your Sinotruk Sitrak heavy-duty truck demands smooth gear engagement and reliable power transmission, the Sliding Sleeve WG7117329081 steps in as a critical component you simply cannot compromise on. Engineered specifically for Sitrak gearbox systems, this sliding sleeve ensures precise synchronizer coupling, reduces transmission wear, and keeps your fleet running without costly downtime. At Mettlead, we supply this part directly from trusted Chinese factories — meaning you get OEM-equivalent quality at a price that protects your bottom line.

Why the Sliding Sleeve WG7117329081 Matters for Your Sitrak Truck

A sliding sleeve might seem like a small component, but it plays an outsized role in your truck’s transmission system. Essentially, it acts as the bridge between the synchronizer hub and the gear, allowing drivers to shift smoothly between gears under heavy loads. Without a properly functioning sliding sleeve, you’ll notice grinding gears, difficult shifting, and eventually, complete transmission failure.

Key Functions and Benefits

• Precision Gear Engagement: The WG7117329081 sliding sleeve features precisely machined internal splines that mesh seamlessly with the synchronizer hub, ensuring clean and effortless gear changes even under extreme torque conditions.
• Superior Wear Resistance: Manufactured from high-grade alloy steel with advanced heat treatment, this sliding sleeve withstands the repeated friction and mechanical stress inherent in heavy-duty truck transmissions.
• Extended Transmission Lifespan: By maintaining proper alignment and engagement force distribution, this component protects surrounding gears and synchronizer rings from premature wear.
• Reduced Maintenance Costs: A quality sliding sleeve minimizes the frequency of gearbox overhauls, translating directly into lower fleet maintenance budgets over time.
• OEM-Matched Fitment: Designed to meet original Sinotruk Sitrak specifications, the WG7117329081 drops right into your existing gearbox assembly without modification.

Technical Specifications – Sliding Sleeve WG7117329081

Application Scenarios – Where Does This Sliding Sleeve Fit?

The Sliding Sleeve WG7117329081 is specifically designed for the Sinotruk Sitrak (重汽汕德卡) series of heavy-duty trucks. It serves as a core transmission drive component within the vehicle’s gearbox assembly. Here’s where and how it’s typically applied:

• Compatible Vehicle Series: Sinotruk Sitrak C7H, Sitrak G7, and other Sitrak heavy-duty tractor and cargo models equipped with matching transmission systems.
• Gearbox Position: Installed within the main gearbox on the synchronizer assembly, facilitating gear engagement between specific speed ratios.
• Use Cases: Long-haul logistics trucks, construction material haulers, heavy cargo transport vehicles, and mining fleet trucks that rely on Sitrak drivetrains.
• Replacement Scenario: Commonly replaced during scheduled gearbox maintenance, after detecting hard shifting, gear pop-out, or abnormal transmission noise.

Whether you’re maintaining a single truck or managing a fleet of Sitrak heavy-duties across Africa, Southeast Asia, or the Middle East, this sliding sleeve delivers the reliable performance your operations depend on. For a complete overview of available Sitrak components, visit our Sitrak Heavy-Duty Parts catalog or browse the full Sinotruk Sitrak Truck Parts category guide.

OEM/ODM Capabilities – Tailored to Your Business Needs

At Mettlead, we understand that B2B buyers often need more than just a standard part off the shelf. That’s why we offer flexible OEM and ODM services designed to match your specific market requirements:

• White-Label Packaging: Want to sell under your own brand? We provide neutral or custom-branded packaging with your logo, part numbers, and labeling specifications.
• Custom Packaging Solutions: From individual blister packs to bulk carton configurations, we adapt packaging to suit your logistics and retail needs.
• Strict Quality Control: Every Sliding Sleeve WG7117329081 undergoes dimensional inspection, hardness testing, and spline tolerance verification before shipment. We don’t cut corners.
• Factory Direct Pricing: By sourcing directly from certified manufacturing partners in China, we eliminate middlemen and pass genuine cost savings to you.
• Fast and Reliable Delivery: Our streamlined supply chain ensures short lead times, whether you need a sample batch or a full container load.

If you’d like to discuss custom requirements or request a product sample, don’t hesitate to contact our team directly.

Frequently Asked Questions – Sliding Sleeve WG7117329081

What exactly does the sliding sleeve do inside the Sitrak gearbox?

The sliding sleeve sits on the synchronizer hub and moves axially along the hub’s external splines. When you shift gears, it slides forward or backward to lock a specific gear to the transmission shaft. In other words, it’s the component that physically connects and disconnects gears during shifting — without it, gear engagement simply doesn’t happen.

How do I know when my sliding sleeve needs replacement?

Several symptoms point to a worn sliding sleeve: difficulty engaging or disengaging gears, gear pop-out under load, grinding noises during shifts, or a noticeable increase in shift effort. If your Sitrak truck shows any of these signs during routine operation, inspecting the sliding sleeve should be a priority during your next gearbox service.

Is this WG7117329081 sliding sleeve identical to the original Sinotruk part?

Yes. The WG7117329081 we supply is manufactured to OEM specifications — same dimensions, same material grade, same heat treatment process. It fits directly into the original gearbox assembly without any adaptation or modification required.

Can a worn sliding sleeve damage other transmission components?

Absolutely. A worn or damaged sliding sleeve can cause uneven force distribution on the synchronizer ring and engagement teeth of adjacent gears. Over time, this leads to accelerated wear on those components, potentially resulting in a much more expensive full gearbox rebuild. Replacing the sliding sleeve promptly is always the more economical choice.

What’s the typical lead time for ordering this part from Mettlead?

For in-stock items, we typically ship within 1–3 business days. For larger bulk orders or custom-packaged shipments, lead time ranges from 7–15 days depending on quantity and destination. We recommend reaching out early to confirm stock availability for your specific order size.

Ready to Source Your Sliding Sleeve WG7117329081?

Stop spending hours searching for reliable Sinotruk Sitrak parts suppliers. Mettlead offers you a one-stop solution with factory-direct pricing, verified quality control, and the flexibility to meet your exact procurement needs — whether you’re ordering a single unit or filling a container.

Take the next step today:

• Request a competitive quote for Sliding Sleeve WG7117329081
• Ask about volume discounts and custom packaging options
• Inquire about our full range of Sitrak transmission components

Contact Mettlead now to get your personalized quote and experience what a truly reliable parts supplier feels like. We’re ready when you are.