Technical support and after-sales service<\/li>\n<\/ul>\nAZ221004000008 (040204) 4th gear is engineered for reliable performance in demanding heavy truck applications. With high-strength materials, precision machining, and optimized transmission efficiency, it ensures smooth operation, reduced noise, and extended gearbox lifespan\u2014making it an ideal choice for repair and replacement needs.<\/p>","protected":false},"excerpt":{"rendered":"
The AZ221004000008 (040204) four-speed gearbox is adapted to heavy-duty truck gearboxes. It adopts high-strength alloy steel forging + carburizing and quenching + precision grinding process, with high tooth surface hardness, strong wear resistance, excellent impact resistance and fatigue resistance, effectively avoiding problems such as tooth loss, abnormal noise, and uneven wear. It is highly compatible with synchronizers and shaft accessories, making it the preferred accessory for heavy-duty truck gearboxes.<\/p>","protected":false},"featured_media":5800,"template":"","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"AZ221004000008 4th Gear for Truck Gearbox | Durable Alloy Steel Transmission Gear","_seopress_titles_desc":"AZ221004000008 (040204) 4th gear for heavy truck gearbox. Made of high-strength alloy steel with carburizing and precision grinding, ensuring smooth power transmission, low noise, and long service life. 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