Alloy steel with precision hobbing and surface quenching delivers high tooth accuracy and tight meshing for multi-tooth shared load and superior load capacity. Enhanced fatigue resistance prevents tooth breakage amid frequent shifting, fully interchangeable with OEM specifications for all ZF12&16-speed auxiliary transmissions to fix slipping and gear jumping faults.
1315332041 Ring Gear
Premium alloy steel is hobbed accurately with uniform tooth pitch and tight meshing for multi-tooth shared load and high loading capacity. Quenched tooth surface improves shock and crack resistance against frequent shifting and heavy startup, resisting deformation under temperature fluctuation. Fully consistent with OEM modulus for all ZF12/16-speed auxiliary transmissions to solve slipping and jumping gear problems.






