ZF 4644.308.562 IDLER GEAR for WG200/WG201 | OEM Genuine Part

Overview

The ZF 4644.308.562 IDLER GEAR is a critical component engineered for the WG200 and WG201 transmission series. This genuine OEM part functions as a torque distribution intermediary within the planetary gearset, ensuring smooth power transfer and load balancing between adjacent shafts. Positioned directly within the main gear train, the idler gear reduces rotational vibration and maintains precise gear mesh alignment. The SKU 4644.308.562 is manufactured to exact ZF tolerances, making it essential for maintaining original equipment performance in heavy-duty industrial applications.

Symptoms of Failure

When the ZF 4644.308.562 idler gear begins to wear, operators may notice distinct operational issues. Whining or grinding noises during gear engagement often indicate pitting or surface fatigue on the gear teeth. Intermittent transmission slipping under load occurs when the idler gear loses its tooth profile integrity, causing momentary power loss. Metallic debris in the transmission fluid is a clear sign of advanced wear, as particles shed from the gear surface contaminate the oil. Additionally, difficulty shifting between forward and reverse can stem from improper idler gear clearance, which disrupts the synchronization of the planetary assembly.

Technical Specifications

Compatibility

This idler gear is directly compatible with the ZF WG200 and WG201 series transmissions. It also fits select models within the WG180 family, where the gear train architecture shares identical tooth geometry and shaft spacing. The 4644.308.562 is specifically designed for use in off-highway vehicles, construction equipment, and agricultural machinery that utilize these ZF power shift transmissions. Always verify your transmission model number before installation to ensure proper fitment.

Related Components

During replacement of the idler gear, it is recommended to inspect and replace associated wear items. The 4460115043 HOUSING encloses the gear assembly and must be free of cracks. The 4469315012 AXLE DRIVE HOUSING supports the output shaft and should be checked for alignment. Two bearing types are commonly used: the 0750117406 TAPER ROLLER BEARING and the 0750117802 TAPERED ROLLER BEARING, both of which seat the idler gear shaft and require replacement if play is detected.