The driving cylindrical gear is the cornerstone of your truck’s transmission system, responsible for transferring engine torque with minimal loss and maximum efficiency. The 99014320136 DRIVING CYLINDERICAL GEAR 28 TOOTH from HOWO is engineered to deliver exceptional strength, precise tooth geometry, and a flawless factory fit, ensuring that your gearbox operates with the reliability and smoothness that professional drivers demand. As a vital Howo/Sitrak truck parts component, this gear is manufactured from high-grade alloy steel, precision-heat-treated and ground to exacting tolerances, providing outstanding resistance to wear, pitting, and fatigue. Whether you are rebuilding a transmission or replacing a worn gear, the 99014320136 guarantees a perfect OEM fit, consistent performance, and extended transmission life – making it the trusted choice for professional workshops and fleet operators worldwide.
The driving cylindrical gear is a key component in the transmission’s gear train, responsible for transmitting power from the input shaft to the countershaft and ultimately to the drive wheels. The 99014320136 is specifically designed for HOWO heavy-duty transmissions, including the HW19710 and HW19712 series, providing the precise gear ratio and torque capacity required for demanding hauling applications. A worn or damaged driving gear can lead to gear whine, vibration, reduced power transfer, and eventual transmission failure. HOWO has engineered this gear with a precision-ground tooth profile that ensures smooth, quiet meshing, and a robust, heat-treated construction that resists deformation and wear. Its 28-tooth design is optimized for durability and efficiency, making it an ideal replacement for your HOWO gearbox. With the 99014320136, you restore the original power transmission efficiency, reduce noise and vibration, and extend the service life of your transmission.
Precision Ground
Smooth Meshing
Heat-Treated
Wear-Resistant
OEM Grade
Genuine HOWO
28 Teeth
Optimized Ratio
Accurate technical data is essential for correct selection and installation. The 99014320136 is manufactured to the highest OEM standards, guaranteeing seamless integration with your HOWO transmission.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 99014320136 | Exact Match |
| Part Name | DRIVING CYLINDERICAL GEAR 28 TOOTH | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / HW19710/HW19712 gearbox | Transmission gear train |
| Number of Teeth | 28 | Precision ground |
| Material | Alloy steel (20CrMnTi) | Carburized & hardened |
| Module | 3.0 | Standard |
| Pressure Angle | 20° | Standard involute |
| Hardness (surface) | 58–62 HRC | Wear resistant |
| Inner Diameter | 45 mm | Precision bore |
| Weight | 1.8 kg | Complete |
| Warranty | 12 Months | Manufacturer Guarantee |
The 99014320136 driving cylindrical gear is a product of advanced manufacturing processes, including precision forging, carburizing, and high-precision grinding. The gear blank is first forged to create a dense, uniform grain structure, then machined to exact dimensions using CNC equipment. The teeth are generated through a gear hobbing process, followed by shaving or grinding to achieve the finest surface finish and tooth accuracy. The gear is then case-carburized and quenched to develop a hard, wear-resistant surface while maintaining a tough, shock-absorbing core. Finally, the gear is honed or ground to final dimensions, ensuring perfect meshing characteristics with its mating gear. Each gear is inspected for tooth profile, lead, and runout using advanced gear measuring instruments, guaranteeing that the 99014320136 meets the most stringent quality standards. This meticulous engineering translates into a gear that delivers quiet, smooth operation and exceptional service life, even in the most demanding transmission applications.
The 99014320136 driving cylindrical gear is specifically designed for HOWO heavy-duty trucks equipped with HW19710 and HW19712 series manual and automated transmissions, commonly found in T7H, A7, and derivative models. It directly replaces the original gear with identical tooth count, module, and inner diameter, ensuring a straightforward installation without modifications. The gear is compatible with all factory-specified shafts and bearings, and it works seamlessly with the existing gear set. This gear is also compatible with many Sinotruk and other commercial vehicles that share the same transmission architecture. To confirm fitment, always cross-reference the OEM number on your existing gear with 99014320136. If they match, this component will integrate flawlessly. Keeping this gear in your spare parts inventory enables rapid transmission repairs, minimising downtime and preserving the performance and reliability of your drivetrain.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
HW19710/HW19712
Transmission Series
Direct Replacement
No Mods
Replacing a worn or damaged driving gear with the 99014320136 immediately restores the precision and efficiency of your transmission. The perfectly formed teeth ensure smooth, quiet gear meshing, reducing noise and vibration within the gearbox. The correct tooth profile and accurate spacing minimise backlash, reducing shock loads on bearings and shafts, which extends the life of the entire transmission. The hardened surface provides excellent resistance to pitting and wear, maintaining the gear’s performance over extended service intervals. Improved gear engagement also translates to more efficient power transfer, reducing parasitic losses and contributing to better fuel economy. For fleet operators, a reliable driving gear reduces the risk of transmission failures, lowers maintenance costs, and helps maintain the performance and reliability of your vehicles. By investing in the 99014320136, you ensure that your HOWO truck’s transmission delivers the smooth, dependable power delivery that professional drivers and fleet managers rely on.
Installing the 99014320136 driving cylindrical gear requires careful attention to detail and proper tooling. Begin by safely removing the transmission and disassembling it according to the manufacturer’s service manual. Inspect the mating shaft and bearings for wear; replace any components that do not meet specifications. Clean the new gear thoroughly to remove any protective oil or debris. When installing, ensure that the gear is correctly aligned with the mating gear and that the thrust clearance is set to the specified value. Use a suitable puller or press to install the gear onto the shaft, taking care not to damage the gear bore or teeth. Lubricate the gear with clean transmission oil before assembly. Reassemble the transmission, torquing all bolts to specification, and fill with the correct grade of lubricant. After installation, test the transmission for smooth shifting and listen for any unusual noises. Periodically inspect the gear for signs of wear during routine transmission oil changes. With proper installation, the 99014320136 will provide years of reliable service.
Pro Tip: When replacing a single gear in a transmission, it is recommended to inspect the mating gear and synchroniser assembly for wear. For optimal performance, consider replacing worn components as a set. The 99014320136 is designed to work with OEM‑spec gears; using genuine parts ensures correct tooth contact and long service life.
Genuine HOWO components are engineered to the highest standards, and the 99014320136 driving cylindrical gear is no exception. Aftermarket gears often use inferior steel, inconsistent heat treatment, or imprecise tooth geometry, leading to premature wear, noise, and eventual failure. HOWO’s gear is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 99014320136, you benefit from HOWO’s rigorous testing, including fatigue, wear, and corrosion resistance tests. This ensures that the gear meets the demanding requirements of heavy-duty trucking. Moreover, genuine parts are backed by a comprehensive warranty and supported by HOWO’s global network, giving you confidence in your purchase.
OEM Authentic
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which transmissions use the 99014320136?
A: It is used in HOWO HW19710 and HW19712 series manual and automated transmissions, commonly found in T7H, A7, and other heavy-duty trucks.
Q: What are the symptoms of a worn driving gear?
A: Gear whine, growling noise, vibration, difficult shifting, and metal particles in the transmission oil are common indicators.
Q: Can I replace just one gear in the transmission?
A: Yes, but it is recommended to inspect the mating gear and replace it if worn to ensure optimal performance and longevity.
Q: How do I verify the correct part?
A: Check the OEM number on your existing gear. If it matches 99014320136, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 99014320136 Driving Cylindrical Gear today! Explore our complete selection of genuine HOWO and Sinotruk transmission components at Howo/Sitrak truck parts and keep your gearbox performing at its peak.
The 99014320136 Driving Cylindrical Gear 28 Tooth from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your transmission delivers the smooth, reliable power transfer required for modern heavy-duty trucking. Whether you are a professional transmission builder or a fleet manager, this gear offers the performance, durability, and exact fit that you can count on. Trust HOWO – the benchmark for excellence in heavy-duty truck components – and experience the difference that genuine quality makes.
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