WG2211040107 4th gear is integrally forged from high-quality alloy steel and undergoes precision heat treatment via carburizing and quenching. It reaches standard hardness with excellent toughness, delivering outstanding wear and impact resistance while eliminating hidden risks of tooth chipping and deformation under heavy loads.

Adopting high-precision gear hobbing and grinding technology, it features regular tooth profiles and tight meshing, ensuring high transmission efficiency, low operating noise and smooth gear shifting without jamming.

Manufactured in strict accordance with original factory standards, it is compatible with Sinotruk HW series gearboxes and mainstream heavy-duty trucks such as HOWO and Sitrak. It is easy to install without modification, maintains stable durability under long-term working conditions, and effectively extends the overall service life of the gearbox.