The Sitrak Truck Differential Housing is a precision-engineered, two-piece assembly that forms the core rotating carrier for the differential gear set in Sinotruk Sitrak heavy-duty truck axles. As a leading provider of genuine Sinotruk Sitrak parts, we offer this critical component manufactured to exacting OEM standards by the reputable Jinan Xiu Jian facility.
The Sitrak Truck Differential Housing is a critical forged or cast steel sub-assembly that serves as the central rotating unit within the truck’s rear axle differential. Manufactured by the certified OEM supplier Jinan Xiu Jian, this housing consists of two precisely mated halves—left and right—that are bolted together to create a robust enclosure. Inside this enclosure, the differential’s internal components, including the side gears connected to the axle shafts and the planetary gears mounted on a cross pin, are housed and allowed to interact.
This housing is far more than a simple container; it is a fundamental load-bearing element of the driveline. Its outer circumference features precisely machined bearing journals that rotate within large tapered roller bearings housed in the main axle carrier. The machining accuracy of these journals and the mounting face for the ring gear is absolutely critical. Any deviation in concentricity, perpendicularity, or surface finish can lead to improper bearing preload, gear misalignment, excessive wear, and ultimately, driveline vibration or failure. The housing must also withstand the shear and bending stresses imposed when the ring gear bolts transfer drive torque from the pinion to the entire differential assembly.
The functional essence of the Sitrak Truck Differential Housing (Jinan Xiu Jian) is to facilitate the differential action—allowing the left and right driving wheels to rotate at different speeds when the vehicle turns a corner. While the housing itself rotates as a single unit with the attached ring gear, the internal gears can spin independently within it. This complex motion places repeated cyclical stresses on the housing structure.
Replacement of the differential housing is a standard repair procedure following gear failures, bearing seizures, or physical damage to the housing itself. The Jinan Xiu Jian version is engineered as a direct, bolt-for-bolt replacement that restores original equipment geometry and performance. It is supplied as a complete matched set to guarantee perfect balance and alignment.
| No. | Part Number | Part Name English | Quantity |
|---|---|---|---|
| 1 | WG7121325168/2 | Differential Housing (Left) (Jinan Xiu Jian) | 1 |
| 2 | WG9231320164/3 | Differential Housing (Right) (Jinan Xiu Jian) | 1 |
Certified Jinan Xiu Jian OEM Manufacturing: Our Sitrak Truck Differential Housing is sourced directly from Jinan Xiu Jian, a recognized and certified original equipment manufacturer within Sinotruk’s authorized supply network. This guarantees that every aspect of production—from material selection and forging to heat treatment and final machining—adheres strictly to the factory’s engineering specifications.
Precision Engineering for Optimal Performance: The bearing journals and ring gear mounting flange on this housing are machined with exceptional precision. Our Jinan Xiu Jian housings undergo stringent quality checks, including measurements for bore concentricity, surface hardness, and thread integrity. This level of precision is non-negotiable for maintaining correct gear alignment and bearing preload.
Perfectly Matched Left & Right Set: We supply the Sitrak Truck Differential Housing as a complete, factory-matched set containing both the left and right halves. This is crucial for ensuring balanced rotation and uniform load distribution. Supplying them as a pair guarantees they originate from the same production batch, with consistent material characteristics and machining tolerances.
Enhanced Durability and Fleet Uptime Assurance: A failing differential housing can lead to devastating secondary damage to costly gears, bearings, and axle shafts, resulting in extensive downtime. Choosing our high-quality Jinan Xiu Jian housing is a proactive investment in drivetrain integrity and fleet reliability. Its robust construction is designed to resist cracking, bearing seat wear, and bolt hole failure.
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