ZF 4644.308.517 IDLER GEAR for WG200/WG201 | OEM Genuine Part

Overview

The ZF 4644.308.517 IDLER GEAR is a critical intermediate component within the WG200 and WG201 series transmissions. This genuine OEM part transfers rotational force between gear clusters, ensuring smooth power flow and precise gear engagement. Positioned on a dedicated shaft within the transmission housing, the idler gear reduces vibration and distributes load evenly across the drivetrain. The SKU 4644.308.517 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life. When replacing this gear, it is essential to inspect the 4460115043: HOUSING for cracks or wear, as misalignment can accelerate gear failure.

Symptoms of Failure

• Whining or grinding noise during gear shifts: A worn idler gear produces a high-pitched whine or metallic grinding sound, especially under load, indicating damaged teeth or bearing surfaces.
• Transmission slipping or delayed engagement: As the gear loses tooth profile integrity, the transmission may hesitate or slip between gears, particularly in lower ranges.
• Metal debris in transmission fluid: Flakes or particles found during oil changes signal advanced wear of the idler gear, often accompanied by reduced hydraulic pressure.
• Vibration at specific RPM ranges: Uneven wear on the idler gear creates harmonic vibrations felt through the chassis, worsening over time.

Technical Specifications

Compatibility

This idler gear is specifically engineered for the ZF WG200 and WG201 series transmissions. It also fits select variants of the WG180 and WG190 models where the gear train configuration matches. Always verify the tooth profile and bore dimensions against your existing part. For complete assembly, pair this gear with the 4469315012: AXLE DRIVE HOUSING and ensure proper bearing support using the 0750117406: TAPER ROLLER BEARING or the 0750117802: TAPERED ROLLER BEARING as required by your specific model.

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