AZ221004000008 (040204) 4th gear is a key transmission component in heavy-duty truck gearboxes, specifically designed for power transmission and conversion in fourth gear. It ensures smooth operation, stable performance, and efficient power delivery during medium to high-speed driving conditions.
Engineered with precision and durability in mind, this gear effectively solves common issues such as gear noise, gear sticking, tooth breakage, and inefficient transmission, making it a reliable choice for heavy truck applications.
Key Features
High Strength Material
Manufactured from premium alloy structural steel through precision forging, providing excellent toughness and strength to withstand high torque and continuous operation.
Advanced Heat Treatment
Carburizing and quenching process ensures:
- Uniform surface hardness
- Excellent wear resistance
- Enhanced fatigue strength
Precision Gear Machining
Gear teeth are finely ground and polished for:
- High tooth profile accuracy
- Smooth surface finish
- Stable and seamless meshing
Optimized Performance
- Reduced transmission loss
- Lower noise and vibration
- Improved driving comfort
Core Functions
Efficient Power Transmission
Ensures stable and precise power delivery in fourth gear, supporting smooth medium- and high-speed driving while balancing performance and fuel efficiency.
Stable & Reliable Operation
Tight gear meshing and high precision design prevent:
- Gear sticking
- Abnormal noise
- Gear jumping
- Tooth breakage
Product Advantages
- High durability for long-term heavy-duty use
- Resistant to deformation and tooth damage
- Smooth shifting with reduced impact
- Lower maintenance frequency and downtime
- Cost-effective solution for gearbox repair
- Accurate fitment and wide compatibility
- Ready stock for fast delivery
Technical Specifications
- Product Name: 4th Gear
- Model: AZ221004000008 (040204)
- Application: Heavy Truck Gearbox
- Material: Alloy Structural Steel
- Process: Precision Forging + Carburizing & Quenching
- Surface Treatment: Gear Grinding & Polishing
Application Scenarios
- Heavy truck gearbox repair and maintenance
- Transmission system replacement
- Auto parts wholesalers and distributors
- Export and OEM supply
Supply & Service
- Stable inventory for quick shipment
- Support bulk orders and customization
- Professional export packaging
- Technical support and after-sales service
AZ221004000008 (040204) 4th gear is engineered for reliable performance in demanding heavy truck applications. With high-strength materials, precision machining, and optimized transmission efficiency, it ensures smooth operation, reduced noise, and extended gearbox lifespan—making it an ideal choice for repair and replacement needs.