The WG2229100021 Transmission Shaft is a core power transmission component used in heavy-duty truck gearboxes.
It is installed between the synchronizer and gears, responsible for precise torque transmission, centering alignment, and wear resistance. It plays a critical role in ensuring smooth shifting, stable power delivery, and reliable gearbox performance under heavy-duty conditions.
This shaft is widely used in gearbox assembly, maintenance, and synchronizer system replacement.
Key Function
- Precisely transmits torque between synchronizer and gears
- Provides centering and positioning for transmission components
- Ensures smooth and stable gear shifting
- Reduces vibration, wear, and abnormal noise
Product Advantages
● High-Strength Alloy Steel Construction
Manufactured from 20CrMnTi / 40Cr alloy structural steel, the shaft features:
- Excellent toughness and wear resistance
- High impact resistance under heavy load
- Stable performance in high-frequency shifting conditions
After carburizing, quenching, and low-temperature tempering, it achieves:
- Hard surface hardness with tough core structure
- Excellent fatigue resistance
- Long service life under heavy-duty operation
● High Torque Capacity & Structural Stability
The solid short-shaft design ensures:
- Uniform force distribution
- Torque capacity ≥ 2500 N·m
- Resistance to twisting and fatigue failure
It effectively prevents deformation, cracking, and transmission failure under extreme load.
● Precision Machining for Smooth Operation
The shaft undergoes precision grinding and polishing, ensuring:
- High dimensional accuracy
- Low friction coefficient contact surface
- Smooth engagement with synchronizer hub and sleeve
This significantly improves shifting smoothness and reduces synchronizer wear.
● Anti-Corrosion & Surface Protection
The surface is treated with blackening anti-rust process, providing:
- Resistance to oil and corrosion
- Protection in 80–120°C gearbox environments
- Long-term durability in harsh conditions
It remains stable without rust or surface degradation.
● Stable Torque Transmission Design
One end connects the synchronizer hub, the other transmits torque, providing:
- Accurate centering alignment
- Reliable circumferential torque transfer
- Prevention of synchronizer displacement or misalignment
This ensures stable and efficient transmission performance.
● Safe Installation & Burr-Free Finish
All edges are precisely chamfered and polished:
- No burrs or sharp edges
- No damage to synchronizer components during installation
- Safe and easy assembly process
Technical Features
- Material: 20CrMnTi / 40Cr alloy steel
- Heat treatment: Carburizing + quenching + low-temperature tempering
- Surface treatment: Precision grinding + blackening anti-rust
- Torque capacity: ≥ 2500 N·m
- Structure: Solid short shaft design
- High-precision fit with synchronizer system
Application Scope
- Heavy-duty truck transmissions
- Synchronizer assembly systems
- Gearbox repair and maintenance
- Commercial vehicle driveline systems
- OEM replacement parts
Performance Benefits
- Efficient and stable torque transmission
- Improved shifting smoothness and accuracy
- Reduced synchronizer wear and failure rate
- Enhanced gearbox reliability under heavy load
- Lower vibration and operating noise
Supply & Service
- Ready stock for fast delivery
- OEM customization supported
- Stable quality for long-term supply
- Professional technical support provided