In the world of heavy-duty transportation, the SINOTRUK HOWO series has established itself as a global workhorse. However, the heart of its drivetrain—the HW19710 or HW15710 transmission—often faces intense operational stress. Understanding common failure modes and implementing rigorous maintenance protocols is critical for minimizing downtime and protecting your fleet’s profitability. In this guide, JINAN ARCHER TRADE CO.,LTD explores the top technical issues encountered in 2026 and how to resolve them.
01 / Difficulty in Gear Shifting: Synchronizer Wear and Air System Leaks
One of the most frequent complaints from HOWO operators is hard shifting or gear grinding. This is typically caused by worn synchronizer rings or a malfunctioning pneumatic shift booster. In 2026, we see increased failures due to air line contamination. JINAN ARCHER TRADE CO.,LTD recommends frequent inspection of the air dryer and ensuring that only genuine SINOTRUK synchronizer kits are used during overhauls to maintain the smooth shifting performance required for long-haul operations.
02 / Abnormal Noise: Bearing Failures and Gear Pitting
Whining or clunking sounds from the gearbox are early warning signs of bearing degradation or gear surface pitting. Failure to address these sounds immediately can lead to catastrophic internal damage. Using low-quality gear oil or extended drain intervals is the primary culprit. At JINAN ARCHER TRADE CO.,LTD, we emphasize the use of high-performance GL-5 85W-90 lubricant and genuine transmission bearings to ensure optimal load distribution and thermal stability within the gearbox housing.
03 / Transmission Overheating: Lubrication and Load Management
Heavy-duty trucks operating in mining or tropical environments often experience transmission overheating. Excessive heat breaks down the oil film, leading to rapid component wear. Ensure that the transmission oil cooler (if equipped) is free of debris and that the oil level is strictly maintained. JINAN ARCHER TRADE CO.,LTD provides heavy-duty oil cooling solutions and premium lubricants specifically designed for the high-torque environments that SINOTRUK HOWO trucks dominate.
04 / Air Leakage in the Range Selector: Valve and Seal Maintenance
The range selector valve is a critical pneumatic component in HOWO’s multi-speed transmissions. Internal air leaks can prevent the truck from switching between high and low ranges, effectively crippling the vehicle. Monthly cleaning of the air filters and replacing the selector valve seals with genuine ARCHER-certified kits can prevent these common field failures and keep your logistics operation running smoothly without interruption.
05 / Sourcing Strategy: The Importance of Genuine Drivetrain Parts
When it comes to the complex internals of a HOWO transmission, there is no substitute for quality. Counterfeit gears and bearings may look identical but lack the metallurgy and heat treatment of factory-certified parts. JINAN ARCHER TRADE CO.,LTD maintains a vast inventory of 100% genuine SINOTRUK transmission components, ensuring that every repair restores the gearbox to its original factory performance standards.
PARTNER WITH ARCHER TODAY
Get the precision, quality, and speed your business deserves.