Product Introduction

This precision-machined detent ring is an integral part of the transmission’s synchronizer system, designed to align and lock the sliding sleeve with the target gear during 3rd-4th gear changes.

• Structure & Material:

• Material: High-strength alloy steel, heat-treated for hardness and wear resistance.

• Design: A split-ring design with external teeth that mesh with the synchronizer sleeve and internal serrations that engage the gear hub. The split construction allows for controlled expansion and contraction during synchronization.

• Finish: Precision-machined and ground surfaces for optimal friction and engagement.

  • Performance:Works with the synchronizer cone to match the rotational speed of the gear and shaft, ensuring smooth, clash-free gear changes.

• The split design and detent features provide positive locking, preventing gear slippage and ensuring reliable engagement.

  • Durability: The hardened steel construction withstands the high friction and impact of frequent gear changes, ensuring long service life under heavy-duty operating conditions.

Core Function

1. Speed Synchronization: Works with the synchronizer cone to equalize the rotational speed of the gear and main shaft before engagement.

2. Positive Locking: Engages with the synchronizer sleeve and gear hub to lock the gear in place, preventing slippage.

3. Clash Prevention: Ensures smooth, clash-free gear changes between 3rd and 4th gears.

3rd-4th Gear Syn Detend 1310304158 ZF Gearbox – OEM-Quality Synchronizer Hub

When your ZF gearbox demands a flawless shift between third and fourth gear, the 3rd-4th Gear Syn Detend 1310304158 is the component that makes it happen. This synchronizer hub sits at the heart of your transmission, coordinating gear engagement with precision timing so drivers experience smooth, reliable shifts under every load condition. Sourced directly from our factory in China, this ZF gearbox part delivers OEM-grade performance at a competitive price point — giving fleet managers and procurement professionals the quality they need without the premium markup.

At Mettlead, we specialize in supplying genuine-spec Chinese truck parts to buyers worldwide. Whether you manage a repair workshop in Africa, a fleet depot in Southeast Asia, or a distribution warehouse in the Middle East, our 3rd-4th Gear Syn Detend 1310304158 for ZF gearbox applications is engineered to meet your exact fitment and durability requirements.

Key Features and Benefits of the 3rd-4th Gear Syn Detend 1310304158

Choosing the right synchronizer hub is not just about matching a part number — it is about ensuring transmission longevity, reducing downtime, and protecting your investment. Here is what sets our ZF gearbox 3rd-4th gear syn detend 1310304158 apart:

• Precise OEM Dimensional Accuracy: Manufactured to match the original ZF specification, ensuring seamless installation without modification.
• High-Grade Material Composition: Forged from wear-resistant alloy steel that withstands the repetitive friction and torque forces inherent in synchronizer operation.
• Optimized Tooth Profile: The detent geometry is carefully machined to provide positive gear engagement while minimizing noise and vibration during 3rd-to-4th gear transitions.
• Extended Service Life: Heat-treated surfaces resist premature wear, which means fewer replacements and lower total cost of ownership for fleet operators.
• Factory-Direct Pricing: By eliminating intermediaries, Mettlead delivers this ZF gearbox synchronizer hub at prices that protect your procurement budget.
• Fast Global Shipping: Stocked and ready to dispatch, so your vehicles get back on the road quickly.

Technical Specifications – 3rd-4th Gear Syn Detend 1310304158

Below you will find the verified technical parameters for this ZF gearbox synchronizer hub. Accuracy matters when you are sourcing transmission components, so every detail has been confirmed against the original specification:

Application Scenarios – Which Vehicles Fit the 1310304158 Synchronizer Hub?

The 3rd-4th Gear Syn Detend 1310304158 is designed specifically for ZF manual transmissions found across a wide range of heavy-duty commercial vehicles. If your fleet includes any of the following platforms equipped with a ZF gearbox, this synchronizer hub is your direct-fit replacement:

• SINOTRUK HOWO heavy-duty trucks with ZF transmission systems
• SINOTRUK SITRAK series commercial vehicles
• SHACMAN (Shaanxi) trucks equipped with ZF gearboxes
• FAW heavy trucks using ZF drivetrain components
• DONGFENG commercial vehicles with compatible ZF units
• FOTON trucks and tractors utilizing ZF manual transmissions

In practical terms, this part is most commonly replaced during gearbox overhauls when operators notice grinding during 3rd-to-4th gear shifts, difficulty engaging gear, or unusual transmission noise under load. Early replacement of the synchronizer hub prevents cascading damage to blocker rings, sliding sleeves, and gear teeth — ultimately saving your operation significant repair costs.

Explore our full range of ZF transmission components at our ZF Gearbox Parts collection, or browse all available Gearbox Components for other transmission brands.

OEM/ODM Capability – Custom Packaging and Private Labeling

Mettlead understands that different markets have different branding needs. That is why we offer flexible OEM and ODM services for the 3rd-4th Gear Syn Detend 1310304158 and all our ZF gearbox parts:

• White-Label Packaging: Receive parts in neutral boxes ready for your own branding, perfect for distributors and wholesalers building their own aftermarket brand.
• Custom Packaging Design: We can produce packaging with your logo, part numbers, and market-specific information printed directly on the box.
• Strict Quality Control: Every synchronizer hub passes dimensional inspection, hardness testing, and surface finish verification before leaving our facility.
• Flexible Order Quantities: Whether you need a trial order of 10 pieces or a container load of 5,000 units, our production line adapts to your demand.
• Factory Visits Welcome: We encourage procurement teams to visit our manufacturing facility in China to audit quality processes firsthand.

Customer Case Study – 3rd-4th Gear Syn Detend 1310304158 in Action

A fleet management company operating 120 HOWO trucks across East Africa approached Mettlead after experiencing repeated 3rd-4th gear shifting failures in their ZF-equipped vehicles. Their existing supplier had been delivering inconsistent synchronizer hubs that wore out within 40,000 km — well below the expected service interval.

After switching to Mettlead’s 3rd-4th Gear Syn Detend 1310304158 for ZF gearbox, the client reported a 60% reduction in transmission-related downtime over the following 12 months. The synchronizer hubs consistently exceeded 120,000 km before requiring inspection, and zero units failed prematurely during the evaluation period. Additionally, our factory-direct pricing reduced their per-unit procurement cost by 35% compared to their previous supplier.

“The 1310304158 synchronizer hubs from Mettlead fit perfectly and hold up in harsh operating conditions. Our drivers stopped complaining about grinding gears, and our maintenance budget finally came under control.” — Procurement Manager, East Africa Fleet Operator

Frequently Asked Questions – 3rd-4th Gear Syn Detend 1310304158 ZF Gearbox

What is the function of the 3rd-4th Gear Syn Detend 1310304158 inside a ZF gearbox?

The synchronizer detend (hub) acts as the central mounting point for the synchronizer assembly between 3rd and 4th gear. It holds the detent springs and blocker ring mechanism in place, enabling smooth speed matching between the input shaft and the target gear before engagement. Without a properly functioning syn detend, gear shifts become harsh, noisy, or impossible.

How do I know when the 1310304158 synchronizer hub needs replacement?

Common symptoms include grinding noise during 3rd-to-4th gear changes, gear popping out of engagement under load, increased shifting effort, and visible wear on the hub splines during gearbox inspection. If your drivers report any of these issues, inspecting the syn detend should be a priority during your next service window.

Is this 3rd-4th Gear Syn Detend compatible with all ZF gearbox models?

Part number 1310304158 is designed for specific ZF transmission variants commonly installed in Chinese commercial trucks such as SINOTRUK, SHACMAN, FAW, and DONGFENG. However, ZF produces multiple gearbox series, so we recommend confirming your transmission model number before ordering. Our team can help you verify compatibility — just share your gearbox nameplate details.

What material is the 1310304158 synchronizer hub made from?

Our 3rd-4th Gear Syn Detend 1310304158 is manufactured from high-carbon alloy steel, then undergoes carburizing and quenching heat treatment. This process creates a hard, wear-resistant surface layer while maintaining a tough core — exactly what the part needs to handle thousands of gear engagement cycles without failure.

Can I order a sample of the 3rd-4th Gear Syn Detend 1310304158 before committing to bulk?

Absolutely. Mettlead supports sample orders so you can verify fitment, material quality, and dimensional accuracy before scaling up. This is especially useful for new customers establishing their supply chain for ZF gearbox parts.

Does Mettlead provide a warranty on the 1310304158 ZF synchronizer hub?

Yes. All Mettlead gearbox components are covered by our quality assurance policy. If any part fails to meet specification upon inspection, we will arrange replacement or credit promptly. Our strict quality control process means warranty claims are rare, but the protection is there for your peace of mind.

Get a Quote for the 3rd-4th Gear Syn Detend 1310304158 – ZF Gearbox Parts Supplier

Ready to secure reliable, factory-priced ZF gearbox synchronizer hubs for your fleet or distribution business? Mettlead makes procurement simple: competitive pricing, fast lead times, secure payment options, and global shipping to your door.

Take the next step today:

• Tell us your required quantity and destination country
• Receive a detailed quotation within 24 hours
• Enjoy flexible payment terms and tracked shipment

Contact Us Now to request pricing on the 3rd-4th Gear Syn Detend 1310304158 or any other ZF gearbox component you need. Our team is standing by to support your procurement goals.