

The Transmission assist support is a critical mounting component that stabilises the gearbox and reduces driveline stress on the HOWO A7 8X4 heavy truck. This robust support system ensures accurate alignment between the transmission and the engine, minimising wear on shafts and bearings. As part of the vehicle’s powertrain mounting solution, the Transmission assist support directly contributes to smooth gear changes and extended component life.
At howo Parts, we engineer the Transmission assist support using high-strength steel and precision fasteners, including the Left bracket, Beam plate, Rubber block, Shim, Hex fangle nut, Bracket, Hex bolt, Flat washer, and 2 type full metal Hex nut. Each element is selected for its ability to withstand vibration, torque reaction, and thermal expansion while maintaining a secure and durable connection.
The Transmission assist support is designed to accommodate the dynamic forces generated during acceleration, braking, and cornering. Its modular construction allows for straightforward installation and adjustment, ensuring that the transmission remains correctly positioned throughout the vehicle’s service life. With this support, fleet operators can expect improved shift quality, reduced noise, and lower maintenance costs over millions of kilometres.
The Left bracket is a sturdy mounting plate that attaches the transmission support to the left side of the chassis frame. It features precisely located holes for bolt attachment and provides a rigid anchor point.
Manufactured from hot-rolled steel and finished with a corrosion-resistant coating, the Left bracket withstands harsh underbody conditions and resists fatigue cracking.
Its design incorporates a slight offset to align with the transmission’s mounting axis, ensuring proper load distribution and reducing bending moments on the fasteners.
The Beam plate is a flat structural member that connects the left and right brackets, forming a rigid crossmember under the transmission. It increases the overall stiffness of the support system.
Fabricated from high-tensile steel plate, the Beam plate is laser-cut and formed to exact dimensions, ensuring a perfect fit between the frame rails without interference.
This component also provides additional mounting surfaces for auxiliary equipment, such as sensors or cable guides, enhancing the versatility of the assembly.
The Rubber block is an elastomeric isolator that absorbs vibration and shock loads from the transmission. It is placed between the support brackets and the transmission housing.
Made from high-grade natural rubber compounded for oil and heat resistance, the Rubber block maintains its damping properties over a wide temperature range.
Its cylindrical shape with central holes allows for easy mounting and provides a controlled deflection that reduces noise, vibration, and harshness (NVH) inside the cabin.
The Shim is a thin, flat piece of metal used to adjust the vertical alignment of the transmission relative to the frame. It compensates for manufacturing tolerances and chassis sag.
Available in various thicknesses, the Shim is placed under the mounting feet to achieve the correct driveline angle, preventing excessive wear on universal joints and bearings.
Its simple design allows for quick installation during initial assembly or service adjustments, ensuring optimal driveline geometry at all times.
The Hex fangle nut is a specialised fastener with a built-in flange that distributes load over a larger area, reducing the risk of surface indentation. It is used in conjunction with hex bolts.
This nut features a serrated bearing surface that provides a locking action, preventing loosening due to vibration. Its hex shape allows for easy tightening with standard wrenches.
Made from high-strength steel and zinc-plated, the Hex fangle nut offers excellent corrosion resistance and reliable clamping force in the Transmission assist support.
The Bracket is a general-purpose mounting element that serves as a connection point between the transmission and the frame. It is designed to accommodate various bolt patterns and orientations.
Stamped from heavy-gauge steel, the Bracket is reinforced with ribs and gussets to increase its load-carrying capacity while keeping weight to a minimum.
Its versatility makes it suitable for both original equipment and aftermarket installations, providing a reliable interface for the Transmission assist support system.
The Hex bolt is the primary fastening element used throughout the Transmission assist support. Its six-sided head enables high torque application with standard sockets and wrenches.
Manufactured from quenched and tempered carbon steel, the Hex bolt offers exceptional tensile strength and shear resistance, ensuring secure connections under dynamic loads.
Available in multiple lengths and thread pitches, the Hex bolt is chosen to match each specific mounting point, providing optimal clamp force and thread engagement.
The Flat washer is a simple circular disc placed under the bolt head or nut to spread the clamping load and protect the surface from damage. It also prevents galling during tightening.
Made from hardened steel with a smooth finish, the Flat washer ensures even pressure distribution, reducing the risk of loosening and prolonging the life of the bolted joint.
In the Transmission assist support, Flat washers are used in combination with Hex bolts and nuts to achieve reliable, long-lasting connections.
The 2 type full metal Hex nut is a prevailing-torque locking nut that provides a secure, reusable fastening solution. Its all-metal construction ensures high-temperature performance.
This nut achieves its locking action through a controlled deformation of the thread profile, creating a consistent frictional force that resists loosening under severe vibration.
It is ideal for critical joints in the Transmission assist support, where safety and reliability are paramount, and can be reused multiple times without losing its locking ability.
| Part NO. | Description |
|---|---|
| WG9725590425 | Left bracket |
| WG9725590523 | Beam plate |
| AZ9725590422 | Rubber block |
| WG9725590424 | Shim |
| Q32016T13F2 | Hex fangle nut |
| WG9725590426 | Bracket |
| AZ9725590422 | Rubber block |
| WG9725590421 | Bracket |
| Q150B1680 | Hex bolt |
| Q151B1630 | Hex bolt |
| Q150B1445TF2 | Hex bolt |
| Q150B1655 | Hex bolt |
| Q40114 | Flat washer |
| Q33214T13F2 | 2 type full metal Hex nut |
Our Transmission assist support is built from premium-grade steel with precise welding and forming processes. The Left bracket and Beam plate are engineered to withstand the high torque outputs of modern diesel engines.
Each component is thoroughly inspected for dimensional accuracy and material integrity, ensuring that the support delivers consistent performance under the most demanding conditions.
The inclusion of high-quality Rubber blocks effectively dampens transmission-induced vibrations, protecting the driveline and improving passenger comfort. The Shim allows fine-tuning of alignment for optimal NVH performance.
This attention to detail reduces wear on adjacent components and contributes to a quieter, more pleasant driving experience over long distances.
With standard Hex bolts and clearly defined mounting points, the Transmission assist support can be fitted quickly using common hand tools. The modular design simplifies removal and replacement.
Clear documentation and pre-assembled sub-components minimise the risk of installation errors, saving time and labour costs for workshops and fleet maintenance teams.
We maintain ample stock of all Transmission assist support components, including Hex fangle nuts, Flat washers, and 2 type full metal Hex nuts, ensuring fast delivery worldwide.
Our logistics partners provide reliable tracking and expedited shipping options, so you can keep your HOWO A7 8X4 fleet operating with minimal downtime.
The Transmission assist support is the result of extensive finite element analysis and real-world testing. Every Left bracket and Beam plate is optimised to provide maximum stiffness with minimal weight, reducing unsprung mass and improving fuel efficiency.
Our design incorporates generous radii and smooth transitions to eliminate stress risers, ensuring that the support can endure millions of load cycles without failure. The Rubber block compounds are specifically formulated to resist oil, ozone, and temperature extremes.
Regular inspection of the Transmission assist support is recommended to detect any signs of fastener loosening, rubber deterioration, or bracket deformation. The Hex bolt and Hex fangle nut should be re-torqued according to the manufacturer’s schedule.
The Flat washer and 2 type full metal Hex nut should be checked for corrosion or thread damage, and the Shim should be examined for wear. Replacing worn components promptly prevents more serious driveline issues.
This Transmission assist support is specifically designed for the HOWO A7 8X4 chassis, accommodating both manual and automated transmissions. The Bracket and Left bracket are drilled to match the factory mounting holes, ensuring a direct replacement.
Whether you operate a dump truck, concrete mixer, or tractor-trailer, our support system provides the necessary rigidity and alignment for reliable power transfer.
All components of the Transmission assist support are manufactured under strict quality control standards, with raw material traceability and in-process inspections. The Rubber block is tested for durometer hardness and adhesion strength.
We back our products with a comprehensive warranty, giving you peace of mind that your investment is protected. Our commitment to quality extends to every Hex bolt, Flat washer, and 2 type full metal Hex nut.
Upgrading to our Transmission assist support ensures that your HOWO A7 8X4 benefits from the latest advancements in mounting technology. The combination of a rigid Beam plate, vibration-damping Rubber blocks, and precision fasteners delivers superior performance.
Experience smoother gear engagement, reduced driveline shudder, and extended transmission life. Our support system is an essential investment for any fleet that values uptime and operational efficiency.
With the right Transmission assist support, your truck will handle heavy loads and rough terrain with confidence, keeping your business moving forward.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.