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The WG2210040802 synchronizer ring is a genuine SINOTRUK HOWO component engineered to enable clash‑free gear changes in heavy‑duty transmissions. As a critical element of the trusted Sinotruk howo parts family, this ring ensures precise speed equalization between gears during shifting, reducing wear on dog teeth and improving driver comfort. Manufactured from high‑strength manganese brass with a wear‑resistant molybdenum coating, the WG2210040802 provides exceptional friction characteristics and durability under the high torque conditions of mining, construction, and long‑haul applications. Its precision‑machined conical surface and internal threading guarantee consistent performance, extending transmission life and minimizing downtime. Investing in this authentic component maintains smooth, reliable shifting in your Howo chassis.
Synchronizer Ring
Кольцо синхронизатора
Anillo sincronizador
The WG2210040802 synchronizer ring is forged from a special manganese brass alloy (CuZn40MnPb) that offers an optimal balance of strength and frictional properties. The conical friction surface is coated with a thin layer of molybdenum through a thermal spray process, providing a high and consistent coefficient of friction even under borderline lubrication conditions. The internal helical splines are precision broached to engage perfectly with the synchronizer hub, ensuring positive indexing and rapid speed equalization during shifts.
Each WG2210040802 ring is 100% inspected for dimensional accuracy, including cone angle, roundness, and surface finish. The molybdenum coating thickness is verified using eddy current testing to ensure it meets OE specifications. The ring is also subjected to a friction test on a synchronizer test rig to validate its performance under simulated operating conditions. This rigorous quality assurance guarantees that the ring will provide smooth, quiet, and durable shifting for hundreds of thousands of kilometers.
The table below provides detailed technical data for the genuine SINOTRUK HOWO WG2210040802 synchronizer ring. These specifications are essential for verifying compatibility and understanding its performance capabilities.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | WG2210040802 | SINOTRUK HOWO Original Code |
| Product Name | Synchronizer Ring | For main shaft gears |
| Base Material | Manganese brass (CuZn40MnPb) | High strength, wear resistant |
| Friction Coating | Molybdenum (Mo) thermal spray | Thickness 0.15‑0.25 mm |
| Inside Diameter (nominal) | 115 mm | Fits main shaft gear cone |
| Outside Diameter | 130 mm | At largest point |
| Width (axial) | 22 mm | Includes indexing lugs |
| Cone Angle | 7° (included angle) | Standard for Howo transmissions |
| Number of Teeth (spline) | 36 | Internal helical spline |
| Hardness (base material) | 120‑160 HB | Optimized for durability |
| Friction Coefficient (dynamic) | 0.10 – 0.12 (with Mo coating) | Consistent over life |
| Applicable Transmissions | HW19710, HW19712, HW25716 | Used on 2nd/3rd gear |
| Included Components | Ring only | Check packaging |
The WG2210040802 synchronizer ring is a direct OEM replacement used in the main shaft gear synchronizer assemblies of Howo 9‑speed and 16‑speed manual transmissions, including the HW19710, HW19712, and HW25716 series. It is typically installed on the 2nd and 3rd gear synchronizers, where the highest shifting frequency and torque loads occur. The ring’s conical friction surface contacts the gear cone, using friction to equalize rotational speeds before the dog clutch engages, eliminating gear clash and enabling smooth, quiet shifts.
In heavy‑duty applications such as mining, logging, and over‑the‑road haulage, the transmission undergoes thousands of shifts per day. A worn synchronizer ring can cause grinding, missed shifts, and increased driver fatigue. By using the genuine WG2210040802 ring, you ensure that the transmission maintains its original shift feel and durability, reducing the risk of gear damage and unscheduled downtime. It is also used in some auxiliary transmission and transfer case synchronizers where the same cone angle and spline configuration apply.
When replacing a synchronizer ring, always inspect the corresponding gear cone for scoring or wear. Replace the gear if damaged. Use the correct assembly lubricant and ensure that the ring is not forced during installation.
Correct installation of the WG2210040802 synchronizer ring is critical to ensure proper shift quality and long service life. Follow these steps:
Clean the synchronizer hub, gear cone, and ring thoroughly. Inspect all components for wear. Ensure the new ring rotates freely on the hub splines and seats evenly on the gear cone.
Apply a light coat of transmission assembly lube to the cone surface. Engage the ring onto the hub, aligning the indexing lugs. Install the gear, ensuring the ring is correctly positioned. Use a press if necessary, but never hammer directly on the ring.
After assembly, check that the gear rotates smoothly and the synchronizer operates without binding. Measure the clearance between the ring and gear when the synchronizer is in the neutral position; it should meet the service manual specification.
A worn synchronizer ring is a common cause of difficult shifting and gear grinding. Common signs that replacement is needed include:
If any of these symptoms are observed, immediate replacement with a genuine WG2210040802 ring is recommended. Continuing to operate with a worn ring can damage gear teeth and synchronizer hubs, leading to expensive transmission overhauls.
The precision‑engineered cone angle and molybdenum coating provide consistent friction, ensuring fast, clash‑free gear engagement under all conditions.
By reducing shock loads during shifts, the genuine ring protects gear teeth and hubs, delaying the need for major repairs and lowering total cost of ownership.
Manufactured to original tolerances with high‑grade materials, the ring withstands the high temperatures and pressures of heavy‑duty use, providing long service life.
To maximize the service life of your WG2210040802 synchronizer ring, follow these best practices:
By adhering to these guidelines, you ensure that the WG2210040802 ring performs optimally throughout its intended service interval.
Aftermarket synchronizer rings are often made from inferior brass alloys with incorrect friction coefficients, leading to rapid wear, poor shift quality, and even gear damage. The genuine WG2210040802 is manufactured to the exact specifications of the original equipment, using a proprietary manganese brass formulation and a precisely controlled molybdenum coating process. Each ring is tested for friction performance and dimensional accuracy, guaranteeing that it will provide the same smooth, durable shifting as the original part.
By choosing authentic SINOTRUK HOWO parts, you protect your investment and ensure your truck maintains its reliability and resale value. The Sinotruk howo parts catalog includes a full range of transmission and chassis components engineered for maximum durability. For fleet managers and owner‑operators who demand the best, the genuine WG2210040802 is the only responsible choice.
The WG2210040802 synchronizer ring is used across a wide range of Howo models: T7H, A7, and classic Howo‑7 series equipped with HW19710, HW19712, and HW25716 transmissions. It is typically fitted on the 2nd and 3rd gear synchronizers. Always verify the gear position and transmission model using the service manual.
Each WG2210040802 is individually wrapped in protective paper to prevent corrosion. The packaging is clearly labelled with the OEM number and batch code. For bulk orders, rings are shipped in sealed cartons with foam dividers to avoid transit damage.
Production of the WG2210040802 takes place in IATF 16949 certified facilities, using precision CNC turning and broaching with in‑process gauging. Statistical process control ensures that dimensional variations are kept to a minimum, far exceeding the requirements of the original design. Every batch is accompanied by a material certificate and friction test report, guaranteeing that the rings delivered are identical to those fitted on new Howo trucks at the factory.
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