Smooth and reliable gear engagement is the hallmark of a well-maintained transmission. The 1297304516 Half-gear sliding sleeve from HOWO is engineered to deliver precise, wear-resistant shifting, ensuring that power flows seamlessly from the gearbox to the driveline. As a critical Howo/Sitrak truck parts component, this sliding sleeve is manufactured from case-hardened alloy steel with precision-ground internal splines and external shift forks, providing consistent engagement and reducing shift effort. Its robust design withstands the high cyclic loads of heavy-duty trucking, preventing premature wear and ensuring smooth gear changes even under extreme torque conditions. Whether you are rebuilding a manual transmission or replacing worn synchronizer components, the 1297304516 guarantees perfect mesh, reduced shift shock, and extended transmission life – making it the preferred choice for professional workshops and fleet maintenance programs globally.
The 1297304516 Half-gear sliding sleeve is a key component in manual and automated manual transmissions, responsible for engaging and disengaging gears by sliding along the mainshaft. Its internal splines mate with the gear hub, while the external dogs interact with the shift fork to select the desired gear ratio. Any wear or distortion in this sleeve leads to difficulty shifting, gear clashing, and eventual transmission failure. HOWO has designed this sleeve with an optimized tooth profile that provides a large contact area, distributing load evenly and reducing stress concentrations. The result is a positive, crisp engagement that reduces shift effort and extends the life of synchronizer rings and gear teeth. Whether you are operating in stop-and-go traffic or hauling heavy loads over long distances, the 1297304516 ensures that your transmission remains responsive and reliable.
Smooth Shifting
Reduced Effort
Case-Hardened
Wear-Resistant
Precision Splines
Zero Backlash
High Torque
Shock-Resistant
Accurate engineering data ensures proper selection and installation. The 1297304516 is manufactured to stringent OEM dimensions, guaranteeing a seamless fit in your HOWO transmission.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 1297304516 | Exact Match |
| Part Name | Half-gear sliding sleeve | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / HW19710 gearbox | Manual & AMT transmissions |
| Material | Case-hardened alloy steel (20CrMnTi) | Surface hardness HRC 58-62 |
| Spline Type | Involute, 12 teeth | Precision ground |
| Outer Diameter | 82 mm | Tolerance ±0.04 mm |
| Length | 54 mm | Overall dimension |
| Surface Finish | Phosphated + oiled | Corrosion protection |
| Warranty | 12 Months | Manufacturer Guarantee |
The 1297304516 Half-gear sliding sleeve is produced using a sophisticated manufacturing process that includes precision forging, carburizing, and high-precision grinding. The raw material is a high-quality alloy steel that is first forged to near-net shape, then machined to achieve the desired geometry. The sleeve is then carburized and quenched to create a hard, wear-resistant surface while maintaining a tough, ductile core that can absorb shock loads without fracturing.
The internal splines are ground to a mirror finish, ensuring a smooth, low-friction interface with the gear hub. The external shift fork grooves are also precision-ground to provide consistent fork engagement and reduce wear. The sleeve’s chamfered edges facilitate smooth gear entry, reducing the risk of clashing. Every 1297304516 is inspected for hardness, dimensional accuracy, and surface integrity using advanced metrology equipment, guaranteeing a product that meets the highest quality standards. This meticulous engineering ensures that your transmission shifts smoothly and reliably, mile after mile.
The 1297304516 is specifically designed for HOWO heavy-duty trucks equipped with HW19710 manual or automated manual transmissions, commonly found in T7H, A7, and other models with MC11/MC13 engines. It is used in the synchronizer assembly for specific gears, typically 3rd/4th or 5th/6th, depending on the transmission configuration. Its spline count and pitch diameter match the original factory part, ensuring a precise fit without modification.
This sleeve is also compatible with certain Sinotruk and other heavy commercial vehicles that use the same transmission architecture. To confirm fitment, always verify the OEM number on your existing sleeve. If it matches 1297304516, this component will integrate seamlessly. Keeping this sleeve in your spare parts inventory allows for rapid transmission repairs during overhauls, minimizing downtime and ensuring your fleet is always ready for the road.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
HW19710 Gearbox
Common Application
Direct Replacement
No Modification
Replacing a worn or damaged sliding sleeve with the 1297304516 restores the precision of your transmission. A fresh sleeve ensures positive, crisp engagement with zero hesitation, eliminating missed shifts and reducing gear clash. This results in a smoother driving experience, less wear on synchronizer rings, and improved overall drivability.
The hardened splines and superior surface finish minimize friction, reducing the effort required to shift gears, which is especially beneficial in heavy traffic or frequent stop-and-go conditions. For fleet operators, using genuine sleeves reduces transmission-related breakdowns, extends oil change intervals, and lowers total maintenance costs. By investing in the 1297304516, you ensure that your HOWO truck’s transmission remains responsive and durable, ready to handle the most demanding workloads.
Installing the 1297304516 Half-gear sliding sleeve requires careful attention to detail. Begin by safely removing the transmission from the vehicle and disassembling the gearbox according to the service manual. Remove the old sleeve by carefully sliding it off the mainshaft, taking care not to damage the synchronizer hub or other components.
Inspect the mainshaft splines, synchronizer hub, and shift fork for wear. Replace any worn components as necessary. Clean all parts thoroughly and apply a thin film of transmission oil to the new sleeve’s splines and contact surfaces. Slide the new sleeve onto the shaft, ensuring it aligns with the hub splines and the shift fork groove. Reassemble the transmission, following the specified torque values for all fasteners. Refill with the correct grade of lubricant and test shift operation before reinstalling the transmission. With proper care, the 1297304516 will provide years of reliable service.
Pro Tip: Always replace the sliding sleeve and synchronizer ring as a set if the ring shows signs of wear. Mixing new and worn components can lead to uneven wear and poor shift quality. The 1297304516 is designed to work with OEM synchronizer rings for optimal performance.
Genuine HOWO components are engineered to the highest standards, and the 1297304516 Half-gear sliding sleeve is no exception. Aftermarket sleeves often use inferior steel, inconsistent heat treatment, or inaccurate spline profiles, leading to premature wear, noise, and shifting difficulties. HOWO’s sleeve is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance.
By choosing the 1297304516, you benefit from HOWO’s extensive testing, which includes durability trials under high torque and extreme temperatures. This ensures that the sleeve can withstand the most demanding conditions. Moreover, genuine parts are backed by a comprehensive warranty and supported by a global network, giving you confidence in your purchase.
OEM Certified
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which transmissions use the 1297304516?
A: It is used in HOWO HW19710 series manual and automated manual transmissions, found in T7H, A7, and similar trucks.
Q: What are the signs of a worn sliding sleeve?
A: Difficulty engaging gears, grinding noises during shifts, and a loose or sloppy shifter feel are common indicators.
Q: Can I reuse the old snap rings?
A: It is recommended to replace all snap rings, circlips, and thrust washers with new ones when rebuilding the transmission to ensure proper retention and preload.
Q: How do I confirm this is the correct part?
A: Check the OEM number stamped on your existing sleeve. If it matches 1297304516, this is the exact replacement. You may also consult your vehicle’s service manual or a HOWO dealer.
Order your 1297304516 Half-gear sliding sleeve today! Explore our complete inventory of genuine HOWO and Sinotruk transmission parts at Howo/Sitrak truck parts and keep your gearbox shifting smoothly.
The 1297304516 Half-gear sliding sleeve from HOWO is a testament to precision engineering and robust materials. By choosing this genuine component, you ensure that your transmission shifts smoothly and reliably, reducing driver fatigue and extending component life. Whether you are a professional mechanic or a fleet manager, this sleeve offers the durability and performance required for modern heavy-duty trucks. Trust HOWO – the benchmark for excellence in heavy-duty truck components – and experience the difference that genuine quality makes.
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