1358 302 224 Main Shaft Gear

1358 302 224 is the core transmission gear of the main box for ZF 12-speed AMT gearbox. It meshes with the input shaft and transmits power to the countershaft gear set.

It is compatible with ZF 12TX2420/2620/2621/2821 and other 12-speed automatic gearboxes, applicable to Sinotruk heavy-duty trucks factory-equipped with ZF automatic transmissions.

With precision ground tooth surfaces and coaxiality within 0.02mm, it adopts surface strengthening treatment for outstanding impact resistance and corrosion resistance.

It effectively avoids faults such as gear jumping, abnormal noise and power interruption. As an original genuine part with high compatibility, it is a key factory component for maintenance and replacement of ZF 12-speed automatic gearboxes.

Original ZF 12-speed AMT Main Shaft Gear, compatible with ZF 12TX series automatic gearboxes and suitable for heavy-duty trucks such as Sinotruk SITRAK and HOWO equipped with ZF automatic transmissions.

Made of high-strength alloy through carburizing and quenching process, it adopts a full helical gear design with high tooth surface precision, ensuring smooth meshing and a transmission efficiency up to 99.7%.

It features excellent fatigue resistance and wear resistance, resisting tooth breakage and edge chipping under heavy loads while maintaining quiet operation.

With original factory standard dimensions, it perfectly matches the input shaft for direct replacement without modification. Ideal for high-load working conditions including long-distance logistics and engineering heavy haulage, its service life far exceeds that of aftermarket parts.