ZF 4108.301.490 INPUT SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4108.301.490 INPUT SHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part receives rotational force directly from the engine’s clutch or torque converter, channeling it into the transmission’s planetary gear sets. Precision-machined from high-strength alloy steel, the SKU 4108.301.490 ensures minimal backlash and reliable power delivery under heavy industrial loads. It mounts within the forward housing assembly, working in tandem with the 4108101177: HOUSING to maintain correct shaft alignment and bearing preload.

Symptoms of Failure

• Transmission gear slipping under load – Worn splines on the input shaft cause intermittent engagement, leading to power loss during acceleration or uphill operation.
• Metallic grinding noise from bell housing – Deteriorated bearing journals or surface spalling produce a distinct grinding sound, especially at idle or low RPM.
• Oil leaks near the front seal area – A damaged shaft surface or worn sealing ring allows transmission fluid to escape, often pooling beneath the vehicle.
• Vibration through the shift lever – Bent or unbalanced input shafts transmit harmonic vibrations that worsen as engine RPM increases.

Technical Specifications

Compatibility

This input shaft is specifically designed for ZF’s WG-series industrial transmissions, including the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 when used with the appropriate 4108201312: HOUSING. Always verify the spline count and bearing seat dimensions against your transmission’s serial plate before installation. For accurate fluid level checks after reassembly, use the 0501225852: OIL LEVEL GAGE and replace the 0501325471: SEALING RING to prevent leaks.

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