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The WG9231320151 Half-Shaft Gear is a premium, heavy-duty chassis differential side gear engineered specifically for SINOTRUK Howo trucks, delivering reliable torque transfer and smooth differential action between the axle shaft and the differential carrier. As a trusted supplier of genuine Sinotruk howo parts, we offer this OEM-grade half-shaft gear as a direct replacement for the original factory unit. The WG9231320151 gear ensures correct spline engagement, stable gear meshing and dependable operation on Howo A7, HOWO 371, HOWO 380 and HC16/ST16 rear axle equipped models.
Manufactured from high-strength alloy steel with carburized and ground gear teeth, a precision-machined internal spline, a hardened bearing journal and a corrosion-resistant finish, this half-shaft gear is built to exact OEM dimensions. Its robust construction maintains correct backlash and tooth contact, resists heavy differential loads, shock, wear and temperature extremes, and performs reliably in constant commercial truck service.
OEM WG9231320151 • Differential side gear • Carburized alloy steel • Precision-ground teeth • Direct OEM fit
The WG9231320151 Half-Shaft Gear is a critical component inside the wheel differential of SINOTRUK Howo HC16 and ST16 rear axles. It meshes with the differential pinion gears and transmits drive torque from the differential carrier to the axle shaft through its internal spline, while allowing the two wheels on an axle to rotate at different speeds during turns.
This WG9231320151 gear is forged and machined to exact OEM dimensions. Tooth count, module, pressure angle, spline size and bearing journal diameter all match the factory specification, so it meshes correctly with the pinion gears and maintains proper backlash and tooth contact patterns under load.
Common signs that a half-shaft gear needs replacement include whining or howling from the rear axle that changes with speed, metal debris or grey paste on the drain plug, excessive backlash between the side gear and pinion gears, pitting or spalling on the gear teeth, and a worn or twisted internal spline.
Fitting a new WG9231320151 Half-Shaft Gear restores correct differential action, quiet gear meshing and reliable torque transfer to the wheels. It is a durable repair that protects the differential carrier, pinion gears, cross shaft and axle shafts from accelerated wear and seizure.
This half-shaft gear is designed for SINOTRUK Howo trucks equipped with HC16 or ST16 rear axles, with primary compatibility across the A7, HOWO 371, HOWO 380 and 08款豪卡 series. It is a direct OE replacement, so it fits the original differential carrier and axle shaft splines without modification.
The gear is essential in applications where reliable differential action and torque transfer are critical, such as long-haul transport, construction, mining and municipal service. In these duties, it must resist heavy driveline loads, shock, heat, contaminated gear oil and frequent wheel speed differences.
When replacing the gear, inspect the axle shaft spline, differential pinion gears, cross shaft, thrust washers and gear oil for wear or damage. A worn axle spline or a damaged pinion gear will shorten the life of any new side gear, so correct these faults before assembly.
For fleets with multiple HOWO trucks, standardising on the WG9231320151 Half-Shaft Gear simplifies differential maintenance and ensures the correct part is available for scheduled axle service or emergency rebuilds.
Replacing the WG9231320151 Half-Shaft Gear is a precision differential repair that requires a press, bearing pullers, measuring tools and a clean workshop. This work should be performed by a qualified technician during axle removal or differential overhaul.
Remove the differential carrier from the axle housing, disassemble the cross shaft and pinion gears, and withdraw the old side gear. Inspect the carrier bore, axle shaft spline and cross shaft for wear, scoring or fretting.
Fit the new side gear with new thrust washers and bearings as specified, check backlash and tooth contact with marking compound, and confirm that the gear rotates smoothly without binding or excessive play.
Reassemble the differential, refill the axle with the specified gear oil and road test the truck through turns and straight running. Monitor for axle noise, vibration or oil leaks during the first service interval.
This half-shaft gear is manufactured in an ISO 9001-certified facility using carburized alloy steel and precision grinding. Incoming steel is checked for chemical composition, hardenability and internal soundness before forging begins.
Each gear is forged, carburized, hardened and ground on precision equipment, then inspected for tooth profile, lead and pitch, internal spline size, bearing journal diameter and surface hardness. Every batch is dimensionally checked, and samples receive a tooth contact and fatigue test before packing.
Batch samples undergo torsional, thermal cycling, salt spray and wear testing to confirm long-term reliability in heavy-duty truck use. These checks help ensure the gear performs in the tough conditions Howo differentials face every day.
This half-shaft gear is covered by a 12-month warranty against material and workmanship defects. Strict quality control means every unit matches the fit, function and durability of the original factory part.
The WG9231320151 Half-Shaft Gear is a vital component for maintaining correct differential action, quiet axle operation and reliable torque transfer on your Howo truck. A worn or damaged side gear can cause axle whine, excessive backlash, metal debris in the oil and costly damage to the carrier and pinion gears.
Manufactured from quality carburized steel with precision-ground teeth and an accurate internal spline, this side gear offers dependable performance and long service life. Its exact OEM dimensions keep installation simple and work with the factory differential carrier.
Fleet operators benefit from reduced axle repair downtime, lower maintenance costs and improved vehicle availability. Owner-operators gain confidence from a gear that meets strict OEM standards and is backed by a 12-month warranty.
Order the WG9231320151 Half-Shaft Gear today and keep your SINOTRUK Howo rear axle running quiet, strong and reliable for years to come.
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