The Sinotruk Howo Rear Axle Drive is a complete, high-performance gear assembly responsible for transferring engine torque to the rear wheels of Sinotruk Howo heavy-duty trucks. Available in various gear ratios and flange configurations, it is engineered for optimal power delivery and durability under extreme loads. Ensuring the longevity and reliability of your truck’s drivetrain requires the use of genuine Sinotruk Howo parts for all repair and maintenance needs.
The Sinotruk Howo Rear Axle Drive, often referred to as the final drive or differential assembly, is the central gear reduction unit housed within the axle. Its primary function is to receive rotational power from the driveshaft, reduce its speed through a set of hypoid gears (the pinion and crown wheel), and transmit increased torque at a right angle to the axle shafts, ultimately driving the wheels. This assembly is critical for vehicle movement, especially under heavy loads.
This sophisticated component consists of multiple precision parts, including the differential carrier housing, bevel pinion and crown wheel set, bearings, shims, adjusting nuts, and various seals and covers. It is designed to handle immense torque loads while providing a specific gear ratio (such as 4.22 or 5.73) to balance pulling power and highway speed, making it adaptable to different operational requirements.
The Sinotruk Howo Rear Axle Drive incorporates a differential mechanism that allows the left and right wheels to rotate at different speeds when turning, preventing tire scrubbing and ensuring stable handling. The entire assembly is sealed within a robust housing filled with gear oil, which provides lubrication and cooling to the internal components during operation.
Available in configurations like FF180 and TF165 with different flange types (toothed or plane), this rear axle drive is engineered for specific Sinotruk Howo truck models and applications. Its precise manufacturing and assembly are paramount to achieving quiet operation, high efficiency, and an extended service life for the entire drivetrain system.
Main Assembly & Components
| No | Number of part | Designation |
|---|---|---|
| 0 | AC71313200660 | Rear axle drive (I=4.22,FF180) |
| 0 | AC71613200130 | Rear axle drive (I=4.22,TF165) |
| 0 | AC71613200662 | Rear axle drive (I=4.22,PF165) |
| 0 | AC71613200663 | Rear axle drive (I=5.73,PF165) |
| 1 | WG40X1233 | Locking nut |
| 2 | 1229X1730 | Washer |
| 3 | Q151C1245 | Screw |
| 4 | 190003888457 | Locking nut |
| 5 | A27961320890 | Θ165 toothed flange C |
| 5—1 | A27961320881 | Θ165 toothed flange body |
| 5 | A29118320280 | Θ180 Toothed flange C |
| 5—1 | A29118320281 | Θ180 Toothed flange body |
| 5 | A29761320167 | Θ165 plane flange C |
| 5—1 | A29761320168 | Θ165 plane flange body |
| 6 | 32646189 | Cover |
| 7 | 41X1408 | Screw |
| 8 | 1229C1511 | Gasket |
| 9 | AI20502291 | Oil sealing |
| 10 | A27961320001 | Bearing seat |
| 11 | 280372755 | Shim |
| 11 | 280322751 | Shim |
| 11 | 280342757 | Shim |
| 11 | 280382758 | Shim |
| 12 | HT15311-HT15334 | Bearing |
| 13 | S2203H8536 | Adjusting slum set |
| 14 | 9220-9278 | Bearing |
| 15 | A29118321014 | Pinion and crown wheel 389 |
| 15 | A29761321014 | Pinion and crown wheel 41/11 |
| 16 | WG212881267 | Roller bering |
| 17 | H29L1624 | Snap ring |
| 18 | MS2161701 | Screw |
| 19 | MS2160601 | Screw |
| 20 | 1229U1503 | Washer |
| 21 | WG41X1275 | Screw |
Differential & Related Components
| No | Number of part | Quantity | Description | Designation |
|---|---|---|---|---|
| 22 | 221451137 | 1 | Adjusting nut | |
| 23 | 119982176 | 1 | Split pin | |
| 24 | JM822010-JM822049 | 1 | Beating | |
| 25 | A3212X1194 | 1 | Cover | |
| 26 | 3235F2138 | 1 | Diff half housing without flange | |
| 27 | 1229L3002 | 2 | Spacer | |
| 28 | 22342L066 | 2 | Bevel pinion | |
| 29 | 42X1024 | 4 | Washer | |
| 30 | 41X1018 | 4 | Screw | |
| 31 | 221461125 | 1 | Adjusting nut | |
| 32 | A3212Z1196 | 1 | Cover | |
| 33 | NP022042-NP579116 | 1 | Beating | |
| 34 | W640X1182 | 16 | Locking nut | |
| 35 | 1229W1557 | 16 | Washer | |
| 36 | A2976132143 | 1 | Diff half housing with flange | |
| 38 | A29118321334 | 16 | Screw | |
| 39 | 3778W335 | 1 | Diff spider | |
| 40 | A29118321001 | 1 | Bevel pinion | |
| 41 | 1229K3001 | 4 | Spacer | |
| 42 | A29761321167 | 4 | Screw | |
| 43 | 1227D472 | 1 | Nut | |
| 44 | A29761321890 | 1 | Drive housing C. | |
| 44 – 1 | A29761321899 | 1 | Drive housing | |
| 45 | A2 3235K21431 | DIFF Assembly | ||
| 46 | A1 3235K21431 | DIFF Housing C | ||
| 47 | KIT 2318 | DIFF Parts |
Our Sinotruk Howo Rear Axle Drive is manufactured to strict original equipment specifications, ensuring perfect compatibility and performance. Each gear set is precision-machined and lapped for optimal contact patterns, resulting in quiet operation, high efficiency, and maximum power transfer with minimal backlash and heat generation.
We offer a range of gear ratios (such as 4.22 and 5.73) and flange types (FF180, TF165, PF165) to suit different Sinotruk Howo models and operational needs. Whether you require high torque for off-road conditions or balanced performance for highway haulage, we have the correct rear axle drive assembly for your specific application.
Built from high-grade alloy steels and equipped with premium bearings and seals, our rear axle drive assemblies are designed for exceptional durability. The components are heat-treated for superior strength and wear resistance, ensuring reliable performance under the most demanding loads and extending the service interval of your drivetrain.
A properly functioning rear axle drive is crucial for overall vehicle efficiency. Our assemblies minimize mechanical losses through precise gear meshing and high-quality lubrication seals. This translates to smoother power delivery, reduced fuel consumption, lower operating temperatures, and ultimately, decreased total cost of ownership for your fleet.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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