Product Introduction

This precision-machined synchronizer ring is a critical friction element of the transmission’s gear shift system, designed to match the rotational speeds of the target gear and main shaft before engagement.

• Structure & Material:

• Material: High-friction bronze alloy, precision-machined with a serrated outer edge and a conical friction surface.

• Design: A split-ring construction with external teeth that mesh with the synchronizer sleeve, and an inner cone that interfaces with the target gear’s friction cone.

• Finish: Precision-machined friction surfaces with fine grooves to improve oil evacuation and increase friction during synchronization.

  • Performance:

• The high-friction bronze material generates controlled friction to equalize the rotational speed of the gear and shaft, eliminating gear clash during shifts.

• The serrated edge ensures positive engagement with the synchronizer sleeve, providing precise feedback during gear selection.

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

  • Compatibility: Direct OE replacement, fully matching the dimensional and friction properties of the HW19710 transmission’s original synchronizer ring.

Core Function

1. Speed Synchronization: Uses friction to match the rotational speed of the target gear and main shaft, preventing gear clash.

2. Clash Prevention: Ensures smooth, quiet gear changes by equalizing speeds before the dog teeth engage.

3. Positive Engagement: The serrated teeth lock into the synchronizer sleeve, providing precise feedback and secure gear holding.

Synchronizer Ring 1297304402 for ZF Gearbox – Premium Quality Replacement

When your ZF gearbox demands a flawless gear transition, every component matters — and the synchronizer ring sits at the heart of that precision. The Synchronizer Ring 1297304402 from Mettlead delivers factory-direct reliability that keeps heavy-duty transmissions shifting smoothly, mile after mile. Engineered to meet OEM specifications, this ZF gearbox synchronizer ring offers wholesale buyers an unbeatable combination of quality, competitive pricing, and consistent supply.

As a trusted global supplier of Chinese brand truck parts, Mettlead understands what distributors and fleet operators need: parts that perform without compromise and arrive on time. That’s exactly what this synchronizer ring delivers.

Synchronizer Ring 1297304402 – Features and Benefits

This ZF gearbox synchronizer ring is precision-manufactured to ensure seamless engagement between gear speeds. Here’s why wholesale buyers consistently choose this part:

• OEM-Grade Material Composition – Crafted from high-strength brass alloy with optimized friction properties, ensuring consistent synchronization performance under extreme operating conditions.
• Precision CNC Machining – Every tooth profile and friction surface is machined to micron-level tolerances, guaranteeing perfect meshing with the synchro hub and sliding sleeve.
• Extended Service Life – Heat-treated surfaces resist premature wear, reducing replacement frequency and lowering total cost of ownership for end users.
• Smooth Gear Engagement – The optimized cone angle and friction coefficient eliminate grinding, hard shifts, and gear clash — even in demanding commercial vehicle applications.
• Direct ZF Gearbox Compatibility – Designed as a drop-in replacement for OEM part number 1297304402, requiring zero modifications during installation.
• Factory-Direct Pricing – By sourcing directly from our manufacturing facility in China, distributors enjoy significant margin advantages without sacrificing quality.

In other words, this synchronizer ring doesn’t just fit — it performs exactly as the original part was designed to, giving your customers confidence in every gearshift.

Technical Specifications – Synchronizer Ring 1297304402

Accuracy matters when you’re sourcing transmission components. Below, you’ll find the detailed parameters for this ZF gearbox synchronizer ring:

Application – Compatible Vehicles and Gearbox Models

The Synchronizer Ring 1297304402 is specifically engineered for ZF manual transmissions commonly found in medium and heavy-duty commercial vehicles. More specifically, this synchronizer ring fits the following applications:

• ZF 16S Gearbox Series – Including 16S151, 16S181, 16S221, and 16S251 variants widely used across European and Chinese heavy trucks.
• Compatible Truck Brands – SINOTRUK HOWO, SITRAK, SHACMAN, MAN, DAF, IVECO, and other commercial vehicles equipped with ZF-licensed transmissions.
• Application Position – Synchronizer assembly within the main gearbox, facilitating smooth speed matching during upshifts and downshifts.

Whether your customers operate long-haul logistics fleets or regional distribution trucks, this synchronizer ring keeps their ZF gearboxes performing at peak efficiency. You can explore our full range of ZF Gearbox Parts or browse the complete Gearbox Parts Category for additional components.

OEM/ODM Capability and White-Label Options

Mettlead goes beyond simply supplying parts. We support your brand growth with flexible manufacturing and packaging solutions:

• White-Label Packaging – Launch your own branded transmission parts line without investing in tooling or production facilities. We pack each synchronizer ring under your label, ready for your market.
• Custom Packaging Design – From box dimensions to label content, our team accommodates your exact specifications to match your brand identity.
• Strict Quality Control – Every Synchronizer Ring 1297304402 undergoes dimensional inspection, material hardness testing, and surface quality verification before shipment.
• Flexible Order Quantities – Whether you’re testing a new market with a trial order or scaling up established demand, our production capacity adapts to your growth.
• Technical Documentation Support – We provide installation guides, dimensional drawings, and cross-reference data to support your aftermarket sales team.

Ultimately, our goal is straightforward: make it as easy as possible for you to build a profitable parts business with reliable supply behind you.

Customer Case Study – ZF Synchronizer Ring 1297304402 Bulk Order

A truck parts distributor based in East Africa approached Mettlead looking for a dependable source of Synchronizer Ring 1297304402 for ZF gearbox applications. Their existing supplier struggled with inconsistent quality — synchronizer rings that wore prematurely, leading to customer complaints and costly warranty returns.

After receiving samples of our ZF gearbox synchronizer ring, their technical team conducted fitment testing on SINOTRUK HOWO trucks equipped with ZF 16S transmissions. The results spoke clearly: precise dimensional accuracy, excellent friction surface quality, and smooth gear engagement from the first installation.

Within three months, this distributor placed recurring monthly orders for 500+ units of Synchronizer Ring 1297304402, along with other ZF gearbox components from our catalog. Their warranty return rate dropped by over 60%, and their end customers reported noticeably smoother shifting performance.

Today, they carry Mettlead-supplied synchronizer rings as their primary stock item for ZF transmission rebuilds — a partnership built on consistent quality and competitive factory-direct pricing.

Frequently Asked Questions – Synchronizer Ring 1297304402

What is the function of Synchronizer Ring 1297304402 in a ZF gearbox?

The synchronizer ring acts as a friction interface between the gear and the synchro hub. When you shift gears, it equalizes the rotational speed of the incoming gear with the output shaft, allowing smooth and clash-free engagement. Without a properly functioning synchronizer ring, drivers experience grinding, hard shifting, and accelerated wear on adjacent transmission components.

How do I know if my ZF gearbox synchronizer ring needs replacement?

Common symptoms include gear grinding during shifts (especially under cold conditions), difficulty engaging specific gears, unusual metallic noises from the transmission housing, and increased shift effort. If your ZF gearbox shows these signs, inspecting the synchronizer ring 1297304402 should be a priority during the next service interval.

Is this synchronizer ring 1297304402 made to OEM specifications?

Yes. Our Synchronizer Ring 1297304402 is manufactured to match the original ZF dimensional tolerances, material composition, and friction characteristics. It serves as a direct replacement — no machining, shimming, or modifications are required during installation.

What material is used in this ZF synchronizer ring?

This synchronizer ring is produced from high-strength brass alloy, which provides the optimal balance of friction coefficient, thermal resistance, and wear longevity demanded by heavy-duty ZF gearbox applications. The friction surface undergoes heat treatment for additional durability.

Can I order Synchronizer Ring 1297304402 with custom branding?

Absolutely. Mettlead offers full white-label and custom packaging services. You can have this ZF gearbox synchronizer ring packed under your own brand, complete with your logo, part number labeling, and packaging design — ideal for distributors building their own aftermarket brand presence.

What is the typical lead time for bulk orders?

Standard stock orders ship within 3–7 business days. For larger wholesale quantities or custom-packaged orders, typical production and delivery timelines range between 15–25 days, depending on volume and destination. We always confirm exact timelines at the quotation stage.

Ready to Source Synchronizer Ring 1297304402 at Factory-Direct Pricing?

Your customers depend on smooth, reliable gear changes — and that starts with sourcing the right synchronizer ring from the right supplier. Mettlead offers the Synchronizer Ring 1297304402 for ZF Gearbox at competitive wholesale prices, backed by strict quality control and flexible logistics.

Here’s what happens when you reach out today:

1. Receive a detailed quotation with pricing tiers based on your order volume.
2. Request free samples to verify fitment and quality before committing.
3. Get a dedicated account manager who understands gearbox parts inside and out.

Don’t let inconsistent supply or unreliable quality slow down your business. Contact us now to get your competitive quote for Synchronizer Ring 1297304402 and discover why distributors across 30+ countries trust Mettlead as their ZF gearbox parts supplier.