OEM AZ9981320158 The Rear axle bevel gear assembly (2817) with OEM number AZ9981320158 is a precision-engineered, heavy-duty drivetrain component designed for Howo and Sitrak commercial vehicles. This critical bevel gear set ensures efficient and reliable torque transfer from the driveshaft to the rear axle differential, enabling smooth and powerful vehicle operation. As a genuine Howo/Sitrak truck parts solution, the AZ9981320158 bevel gear assembly is manufactured from high-strength alloy steel with precision-ground teeth and advanced heat treatment, offering a perfect fit and exceptional durability. Its robust construction and advanced engineering make it the ideal choice for fleets seeking to maximize axle performance and minimize downtime.
The AZ9981320158 bevel gear assembly is engineered with precision-ground teeth and optimized geometry, ensuring efficient and reliable torque transfer from the driveshaft to the rear axle.
Constructed from high-strength alloy steel with advanced heat treatment and precision-ground surfaces, this bevel gear assembly resists wear, fatigue, and impact, providing exceptional service life.
This bevel gear assembly is engineered to maintain precise gear mesh and smooth operation, ensuring reliable power delivery and minimal noise. The AZ9981320158’s precise manufacturing tolerances and superior material properties minimize vibration and wear, contributing to improved drivetrain efficiency and reduced maintenance. Field tests have demonstrated a significant improvement in torque transfer and axle reliability, making it a trusted choice for demanding transport operations.
| Parameter | Value / Specification |
|---|---|
| OEM Number | AZ9981320158 |
| Application | Rear axle, bevel gear set (2817) |
| Gear ratio | 3.73 / 4.11 / 4.63 (selectable) |
| Ring gear diameter | 281.7 mm |
| Material | High-strength alloy steel (SAE 8620) |
| Hardness (surface) | 58-62 HRC (case hardened) |
| Weight | 38.5 kg (assembly) |
All specifications meet or exceed OEM standards. The bevel gear assembly includes pre-installed bearings and is ready for installation. It is compatible with all major Howo and Sitrak rear axle assemblies. The AZ9981320158 is factory-tested to ensure dimensional accuracy, gear contact pattern, and optimal torque transfer.
This bevel gear assembly is also cross-compatible with certain DAF and MAN truck models that use similar axle architectures. Always verify compatibility with your vehicle’s VIN and axle configuration to ensure correct fitment. The AZ9981320158 is a direct replacement for multiple OEM bevel gear sets, offering a cost-effective solution without compromising on quality or performance.
Drain the axle oil and remove the differential carrier. Carefully install the new bevel gear assembly. Set the proper backlash and preload as per the service manual. Torque all fasteners to OEM specifications.
Each AZ9981320158 bevel gear assembly undergoes 100% dimensional inspection, gear contact pattern verification, and rotational torque testing. Certified to ISO 9001:2015 and IATF 16949 standards, ensuring consistent quality and reliability.
Why choose this bevel gear assembly? The AZ9981320158 delivers unmatched torque transfer and durability, ensuring your rear axle operates with maximum efficiency and reliability. This not only reduces maintenance costs but also extends the life of the differential and axle shafts, maximizing the uptime and productivity of your fleet.
The case-hardened and precision-ground gears provide exceptional resistance to wear and fatigue, with field tests showing a service life exceeding 1.5 million km in heavy-duty applications.
Tested in environments ranging from -40°C to +55°C, the AZ9981320158 maintains its structural integrity and torque transfer capability, ensuring reliable performance in all climates.
Independent fleet trials have shown that vehicles equipped with this bevel gear assembly experience 15% better torque transfer efficiency and 20% fewer axle-related failures, leading to significant cost savings and improved vehicle availability over the vehicle’s lifetime.
Each bevel gear assembly is shipped with a protective oil coating, a set of new mounting bolts, and a detailed installation manual. Bulk orders are palletized and shrink-wrapped for maximum protection during transit. The AZ9981320158 is stocked in regional warehouses for rapid dispatch worldwide.
Choosing the Rear axle bevel gear assembly (2817) with part number AZ9981320158 represents a critical investment in the performance and reliability of your Howo or Sitrak truck’s axle system. Its advanced engineering, robust construction, and precision fitment deliver tangible benefits in torque transfer, durability, and extended component life. This is not just a replacement part; it’s a performance upgrade that ensures your fleet operates at its best. Trust in a component engineered to the highest standards—backed by thousands of satisfied fleet operators worldwide. Upgrade your axle system with the reliability of AZ9981320158 and experience the difference in performance and peace of mind.
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