Product Introduction

• Structure: An integrated assembly consisting of a high-strength nickel-chromium alloy steel hub, sliding sleeve, copper-based dual-cone synchronizer rings, and spring-loaded shift blocks. The hub and sleeve feature carburized and hardened teeth (HRC 58–62) for extreme wear resistance, while the dual-cone synchronizer rings use a friction-enhancing copper alloy with precision-machined cone surfaces to maximize synchronization efficiency.

• Performance: The dual-cone friction design rapidly equalizes the speed of 5th/6th gears with the main shaft, eliminating gear impact and enabling smooth, shock-free shifts even under high torque loads. The high-hardness teeth ensure reliable torque transmission, and the spring-loaded blocks maintain precise alignment between the sleeve and hub, ensuring consistent performance in harsh operating environments.

Core Function

1. 5th/6th Gear Synchronization: Uses dual-cone friction to match the rotational speed of 5th/6th gears to the main shaft, eliminating gear clash during shifting.

2. Smooth Gear Engagement: Enables shock-free meshing of the sliding sleeve and gear teeth, improving shift quality and extending component life.

3. Torque Transmission: Once synchronized, the sliding sleeve locks onto the gear, transferring torque from the main shaft to the output.

Synchronizer Assembly 12JSDX240T-1701190 Shacman – Premium Gearbox Component for Heavy-Duty Trucks

When your Shacman heavy-duty truck demands seamless gear shifting and maximum drivetrain reliability, the Synchronizer Assembly 12JSDX240T-1701190 stands as the critical component that keeps everything running smoothly. Engineered specifically for Shacman trucks equipped with the Fast 12JSDX240T gearbox, this synchronizer assembly ensures precise synchronization between gears, eliminates grinding, and dramatically extends transmission life. At Mettlead, we supply this genuine-spec part directly from our factory in China, delivering OEM-grade quality at a competitive wholesale price that procurement managers truly appreciate.

Why This Synchronizer Assembly 12JSDX240T-1701190 Matters for Your Fleet

A synchronizer assembly is far more than just a gearbox component — it is the heart of smooth gear engagement. Without a properly functioning synchronizer, drivers experience harsh shifting, increased wear on transmission internals, and ultimately costly downtime. Here is what makes this particular Shacman synchronizer assembly a smart investment:

• Precision-Engineered Gear Synchronization: The synchronizer ring and hub assembly work in perfect harmony to match rotational speeds between gears, ensuring effortless and noise-free shifting even under heavy loads.
• Extended Transmission Lifespan: By reducing metal-to-metal contact during gear changes, this assembly protects your gearbox internals and significantly delays the need for expensive transmission overhauls.
• Reduced Driver Fatigue: Smooth shifting translates directly into less physical effort for drivers, which improves comfort during long-haul operations and boosts overall productivity.
• Direct OEM-Spec Replacement: Manufactured to match the exact dimensions and material specifications of the original Shacman part, so installation is straightforward with no modifications required.
• Strict Quality Control: Every unit undergoes rigorous dimensional inspection, hardness testing, and surface finish verification before leaving our facility.

Technical Specifications – Synchronizer Assembly 12JSDX240T-1701190

Application Scenarios – Where This Synchronizer Assembly Performs

The Synchronizer Assembly 12JSDX240T-1701190 is specifically designed for Shacman heavy-duty trucks fitted with the Fast 12JSDX240T series transmission. Consequently, you will find this component working reliably across a wide range of demanding applications:

• Long-Haul Logistics Trucks: Shacman X3000 and F3000 series tractors that cover thousands of kilometers require synchronizers that withstand continuous gear cycling without degradation.
• Construction and Mining Vehicles: Shacman dump trucks operating in harsh off-road environments benefit from the enhanced durability and wear resistance of this assembly.
• Bulk Material Transport: Cement mixers, tankers, and bulk carriers equipped with the 12JSDX240T gearbox rely on this synchronizer for smooth operation under varying load conditions.
• Fleet Maintenance Programs: Preventive replacement of synchronizer assemblies during scheduled overhauls helps fleet operators avoid unexpected breakdowns and maintain uptime targets.

In short, wherever a Shacman truck uses the Fast 12JSDX240T gearbox, this synchronizer assembly is the correct and reliable replacement choice. For more Shacman transmission components, explore our complete Fast Gearbox Parts catalog.

OEM/ODM Capability – Tailored to Your Market Needs

At Mettlead, we understand that different markets have different requirements. That is why we offer flexible OEM and ODM services for the Synchronizer Assembly 12JSDX240T-1701190 and other gearbox components in our range:

• White-Label Packaging: We can supply this synchronizer assembly under your own brand identity, complete with your logo, part numbers, and custom labeling — ideal for distributors building regional brand recognition.
• Custom Packaging Solutions: Whether you need individual retail boxes, bulk industrial packaging, or specific labeling for your warehouse system, we accommodate your requirements.
• Factory-Direct Pricing: By sourcing directly from our manufacturing facility in China, you eliminate middlemen and secure the most competitive unit costs for your procurement budget.
• Flexible Order Quantities: We work with both small trial orders and large-volume contracts, adapting to your inventory strategy and market demand.
• Quality Assurance Documentation: Inspection reports, material certificates, and testing documentation are available upon request to satisfy your internal quality requirements.

Customer Case Study – Synchronizer Assembly 12JSDX240T-1701190 in Action

A fleet maintenance company based in West Africa was experiencing recurring transmission problems across their Shacman F3000 truck fleet. Specifically, drivers reported grinding noises and difficulty engaging gears, particularly in 3rd and 4th positions. After diagnosing the issue, their technicians identified worn synchronizer assemblies as the root cause.

The company’s procurement manager reached out to Mettlead seeking a reliable supply of Synchronizer Assembly 12JSDX240T-1701190 Shacman parts at competitive pricing. We provided samples for testing, and after their technical team verified the dimensional accuracy and material quality, they placed an initial order of 50 units.

Following installation, the fleet reported immediate improvement in shift quality. Moreover, over the subsequent six months, none of the replaced synchronizers showed signs of premature wear. As a result, the client now maintains a standing quarterly order and has expanded their purchases to include additional Fast gearbox components from our catalog. This partnership demonstrates how sourcing quality-controlled synchronizer assemblies directly from Mettlead translates into real-world reliability and cost savings.

Frequently Asked Questions – Synchronizer Assembly 12JSDX240T-1701190

What are the signs that my Synchronizer Assembly 12JSDX240T-1701190 needs replacement?

The most common symptoms include grinding or crunching noises when shifting gears, difficulty engaging specific gears (especially under cold conditions), and a noticeable increase in the force required to move the gear lever. If your Shacman truck’s 12JSDX240T gearbox displays any of these behaviors, the synchronizer assembly is likely worn and should be inspected promptly to prevent further transmission damage.

Is this synchronizer assembly compatible with all Shacman truck models?

This particular Synchronizer Assembly 12JSDX240T-1701190 is designed exclusively for Shacman trucks equipped with the Fast 12JSDX240T series transmission. It is not interchangeable with other gearbox models. Therefore, always verify your truck’s gearbox model number before ordering to ensure correct fitment.

What material is the synchronizer ring made from, and why does it matter?

The synchro rings in this assembly are manufactured from high-quality brass alloy, which provides the ideal friction coefficient for smooth speed matching between gears. Brass also offers excellent wear resistance and thermal stability, meaning the synchronizer maintains consistent performance even during aggressive driving or heavy load conditions.

How long does this synchronizer assembly typically last?

Under normal operating conditions and with proper driving technique, this synchronizer assembly is engineered to match OEM service life — typically between 300,000 and 500,000 kilometers. However, actual lifespan depends on factors such as load conditions, driving habits, transmission oil quality, and maintenance intervals.

Can I order a single unit for testing, or is there a minimum order quantity?

We support sample orders so that you can evaluate quality before committing to larger volumes. This approach gives your technical team the opportunity to verify fitment and performance firsthand. Simply contact our sales team to arrange a sample shipment.

Does the synchronizer assembly come pre-assembled or as individual components?

This part ships as a complete synchronizer assembly, ready for installation. All internal components — including the hub, sleeve, synchro rings, and spring elements — are pre-assembled and inspected as a unit, saving your technicians time and ensuring proper alignment.

Get Your Synchronizer Assembly 12JSDX240T-1701190 Quote Today

Whether you are restocking your parts inventory, sourcing for a fleet overhaul project, or establishing a long-term supply partnership for Shacman gearbox components, Mettlead is ready to support your needs with factory-direct pricing, strict quality control, and reliable global delivery.

Take the next step: Contact us now to request a competitive quotation for the Synchronizer Assembly 12JSDX240T-1701190. Share your required quantity, preferred packaging, and delivery destination — our team will respond within 24 hours with a detailed offer tailored to your procurement requirements.

Mettlead – Your trusted China-based supplier for Shacman, SINOTRUK, HOWO, FAW, WEICHAI, DONGFENG, and FOTON truck parts. Factory quality, global reach.