Product Introduction

This precision-forged gear is a key component of the transmission’s main shaft gear set, engineered to handle high torque loads and provide smooth, reliable power transfer in 3rd gear.

• Structure & Material:

• Material: High-strength alloy steel, precision-forged and heat-treated for a hardened tooth surface and a tough, impact-resistant core.

• Design: A straight-cut (spur) gear with precision-machined teeth, designed to mesh with the corresponding countershaft 3rd gear.

• Finish: Gear teeth are precision-ground for optimal meshing, reduced noise, and minimal wear. The inner bore is precision-machined for a press-fit onto the main shaft.

  • Performance:

• Transmits high torque loads during mid-speed driving, ensuring efficient power delivery and stable operation.

  • Durability: The hardened steel construction and optimized tooth geometry withstand high stress and impact, ensuring long service life even under frequent gear changes and heavy loads.

Core Function

1. Torque Transmission: Transmits engine torque from the countershaft to the main shaft when in 3rd gear.

2. Power Transfer: Contributes to the transmission’s gear ratio progression, enabling efficient mid-speed driving.

3. Load Handling: Withstands high torque loads typical of heavy-duty vehicle operation.

2nd Shaft 3rd Gear 2159304005 ZF Gearbox – Premium Transmission Gear for Heavy-Duty Trucks

When your ZF gearbox demands a reliable replacement for the 2nd shaft 3rd gear, precision engineering isn’t optional — it’s essential. The 2nd Shaft 3rd Gear 2159304005 ZF Gearbox from Mettlead delivers exactly the kind of durability and dimensional accuracy that keeps your fleet moving without costly downtime. Manufactured to meet or exceed OEM specifications, this transmission gear is built for the toughest operating conditions on the road. Moreover, with factory-direct pricing from China, you get exceptional value without compromising on quality.

Why Choose the 2nd Shaft 3rd Gear 2159304005 for Your ZF Gearbox

Choosing the right transmission component can mean the difference between smooth hauling and expensive breakdowns. Here’s why fleet managers and procurement professionals trust Mettlead’s 2nd Shaft 3rd Gear 2159304005 ZF Gearbox:

• OEM-Grade Precision: Every gear tooth is machined to exact tolerances, ensuring seamless meshing with mating components inside your ZF transmission assembly.
• Superior Material Composition: Crafted from high-strength alloy steel with advanced heat treatment, this gear resists wear, fatigue, and impact even under heavy torque loads.
• Extended Service Life: Thanks to precision grinding and surface hardening processes, the 2159304005 gear consistently outlasts inferior aftermarket alternatives.
• Noise Reduction: Tight manufacturing tolerances translate to quieter gear engagement, reducing NVH (Noise, Vibration, Harshness) levels in the drivetrain.
• Direct Fitment: Designed as a drop-in replacement, this part installs without modification — saving your workshop valuable labor hours.
• Cost-Effective Sourcing: Factory-direct supply eliminates middlemen, so you get competitive pricing that strengthens your bottom line.

In addition to these performance advantages, Mettlead backs every 2nd Shaft 3rd Gear 2159304005 with strict quality control protocols, ensuring that what arrives at your warehouse is exactly what your ZF gearbox needs.

Application Scenarios – Compatible Vehicles and Gearbox Models

The 2nd Shaft 3rd Gear 2159304005 ZF Gearbox is engineered specifically for ZF transmission systems widely used across Chinese and international heavy-duty truck platforms. Consequently, this gear fits a broad range of commercial vehicles, including:

• SINOTRUK HOWO heavy-duty trucks equipped with ZF manual transmissions
• SINOTRUK SITRAK series with ZF gearbox configurations
• SHACMAN (Shaanxi Automobile) trucks running ZF drivetrain systems
• FAW heavy trucks utilizing ZF transmission assemblies
• DONGFENG commercial vehicles with compatible ZF gearbox variants
• FOTON heavy-duty platforms fitted with ZF gear systems

Furthermore, this 2nd shaft 3rd gear serves as a critical component within the ZF gearbox’s power transmission path, specifically handling third-gear engagement on the secondary shaft. Whether your trucks operate on highways, construction sites, or mining hauls, this gear is built to withstand the demands of continuous heavy-load operation.

For a complete selection of ZF transmission components, browse our ZF Gearbox Parts Collection or explore our full Gearbox Parts Category for additional transmission solutions.

Technical Specifications – 2nd Shaft 3rd Gear 2159304005

OEM/ODM Capability – Flexible Solutions for Your Business

At Mettlead, we understand that every distributor and fleet operator has unique requirements. That’s precisely why we offer comprehensive OEM and ODM services for the 2nd Shaft 3rd Gear 2159304005 ZF Gearbox and all our transmission components.

What We Offer

• White-Label Packaging: Receive the 2159304005 gear in your own branded packaging, complete with your logo, part numbers, and documentation — ready for immediate resale.
• Custom Packaging Solutions: Whether you need bulk industrial packaging for workshop supply or individual retail-ready boxes, we adapt to your specifications.
• Strict Quality Control: Each gear undergoes rigorous inspection including dimensional measurement, hardness testing, and surface finish verification before shipment.
• Flexible MOQ: We work with businesses of all sizes, from small workshop orders to large-scale fleet procurement contracts.
• Factory Visits Welcome: We invite international buyers to visit our production facilities in China, inspect processes firsthand, and build lasting partnerships with confidence.

Additionally, our production team can accommodate special material requests or modified specifications if your application demands non-standard parameters. Simply share your technical drawings, and our engineers will evaluate feasibility promptly.

Customer Case Study – 2nd Shaft 3rd Gear 2159304005 ZF Gearbox in Action

A fleet maintenance company based in East Africa was experiencing recurring third-gear failures across their fleet of 45 SINOTRUK HOWO trucks. Their previous aftermarket supplier had been delivering 2nd shaft 3rd gear replacements with inconsistent hardness levels, leading to premature tooth wear — sometimes within just 30,000 kilometers of installation.

After discovering Mettlead through an online search for 2159304005 ZF gearbox parts, their procurement manager reached out for a trial order of 20 units. Upon receiving the shipment, their workshop team immediately noticed the difference in surface finish quality and precise dimensional accuracy.

Within six months of switching to Mettlead’s 2nd Shaft 3rd Gear 2159304005 ZF Gearbox, the fleet reported:

• Zero premature gear failures across all 45 vehicles
• Average gear service life extended beyond 150,000 kilometers
• 23% reduction in overall transmission maintenance costs
• Simplified procurement through a single reliable supplier for all ZF gearbox components

Today, this customer orders the full range of ZF transmission parts from Mettlead on a quarterly basis, and they’ve since recommended our products to three other fleet operators in the region.

Frequently Asked Questions – 2nd Shaft 3rd Gear 2159304005 ZF Gearbox

What exactly is the 2nd Shaft 3rd Gear 2159304005 in a ZF gearbox?

The 2159304005 is a precision-machined gear that sits on the secondary shaft (also called the countershaft or 2nd shaft) of the ZF manual transmission. Specifically, it handles third-gear power transmission, transferring torque from the input side through to the output shaft when third gear is engaged. Because it operates under high rotational speeds and significant load, it requires exceptional material hardness and tooth profile accuracy.

How do I verify that part number 2159304005 fits my specific ZF gearbox model?

The most reliable method is to cross-reference the part number 2159304005 with your existing gearbox assembly’s parts catalog or nameplate data. If you can provide your ZF gearbox model number or your truck’s VIN, our technical team at Mettlead can quickly confirm compatibility. Simply contact us with your details, and we’ll respond within 24 hours.

What causes premature wear on the 2nd shaft 3rd gear in ZF transmissions?

Several factors can accelerate gear wear, including insufficient or degraded transmission oil, misaligned synchronizer assemblies, aggressive shifting habits, and — most commonly — the use of substandard replacement gears with inadequate heat treatment. The 2159304005 gear from Mettlead addresses this last factor through proper carburizing and quenching processes that achieve consistent surface hardness of HRC 58–62.

Is the 2159304005 gear from Mettlead an original OEM part or aftermarket?

Mettlead supplies OEM-equivalent aftermarket parts. This means our 2nd Shaft 3rd Gear 2159304005 is manufactured to the same dimensional specifications, material standards, and performance benchmarks as the original ZF component. The key difference is our factory-direct pricing model, which eliminates brand-name markups while maintaining identical functional quality.

What is the typical lead time for bulk orders of the 2159304005 gear?

For standard stock quantities, we typically ship within 3–7 business days after payment confirmation. For larger bulk orders or custom-packaged shipments, production and delivery usually take 15–25 business days depending on quantity and destination. We always recommend planning ahead for fleet maintenance schedules to ensure parts arrive when you need them.

Can I order a sample of the 2nd Shaft 3rd Gear 2159304005 before committing to bulk?

Absolutely. We encourage new customers to order samples for inspection and fitment testing. This allows your quality team to verify hardness, dimensions, and surface finish before scaling up. Sample orders typically ship within 3 business days.

Ready to Source Your 2nd Shaft 3rd Gear 2159304005 ZF Gearbox Parts?

Don’t let transmission downtime eat into your fleet’s productivity. Whether you need a single replacement gear or a recurring supply of 2nd Shaft 3rd Gear 2159304005 ZF Gearbox components for your distribution network, Mettlead is your factory-direct partner in China.

Here’s how to get started:

1. Share your required quantity and delivery destination
2. Receive a competitive quotation within 24 hours
3. Approve pricing and confirm your preferred payment method
4. Receive your order with full quality documentation

We offer flexible and secure payment options, reliable international shipping, and dedicated support from our experienced export team. Every order is backed by strict quality inspection before it leaves our facility.

Contact Us Now to request a quote for the 2nd Shaft 3rd Gear 2159304005 or any other ZF gearbox components. Our team is ready to support your procurement needs with professional service and competitive factory pricing.

Looking for more ZF transmission parts? Visit our ZF Gearbox Parts page or browse all available Gearbox Components to find everything you need in one place.