ZF 4108.303.241 IDLER GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4108.303.241 IDLER GEAR is a critical component within the WG100, WG130, and WG131 transmission assemblies. This OEM genuine part functions as an intermediate gear, transferring rotational force between the input shaft and the main drive gears to ensure smooth power distribution and torque management. Positioned within the gear train, the idler gear reduces vibration and balances load across the system. The SKU 4108.303.241 is precision-machined to ZF’s exacting tolerances, making it essential for maintaining transmission efficiency in heavy-duty industrial applications.

Symptoms of Failure

• Whining or grinding noise during gear engagement: When the idler gear wears, its teeth develop pitting or uneven surfaces, producing a distinct metallic sound that intensifies under load.
• Transmission gear slipping under heavy torque: A worn 4108.303.241 can cause intermittent loss of power transfer, leading to unexpected slippage during acceleration or uphill operation.
• Metal debris in transmission fluid: As the gear degrades, fine metallic particles contaminate the oil, often visible during routine fluid changes or inspections.
• Increased operating temperature: Excessive friction from a damaged idler gear forces the transmission to run hotter than normal, potentially triggering thermal warnings.

Technical Specifications

Compatibility

This idler gear is engineered for ZF’s WG100, WG130, and WG131 series transmissions, commonly found in off-highway trucks, agricultural machinery, and construction equipment. It also fits select variants of the WG180 and WG200 models when used in auxiliary drive configurations. Always verify the transmission serial number against the OEM parts catalog to ensure correct fitment.

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