ZF 4143.302.058 INPUT SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.302.058 INPUT SHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part sits at the front of the gear train, directly coupling engine power to the planetary gear sets. As the primary rotational interface, it must withstand high torsional loads and maintain precise alignment with the 4143101009 HOUSING and 4143301025 HOUSING. The SKU 4143.302.058 is manufactured to ZF’s exacting tolerances, ensuring minimal backlash and extended service life in heavy-duty industrial applications.

Symptoms of Failure

• Oil leaks at the front seal area: Worn splines or shaft surface scoring can damage the 0634313603 O-RING, causing transmission fluid to weep from the input housing.
• Gear slipping under load: Fatigue cracks or spline wear prevent the shaft from fully engaging the clutch hub, resulting in intermittent power loss during acceleration.
• Abnormal vibration or whining noise: A bent or unbalanced input shaft creates harmonic resonance, especially at higher RPM ranges, indicating imminent failure.
• Metal debris in transmission fluid: Flaking from the hardened steel surface contaminates the oil, often accompanied by difficulty shifting gears.

Technical Specifications

Compatibility

This input shaft is designed for ZF’s WG100, WG130, and WG131 series transmissions, commonly found in medium-duty trucks, buses, and construction equipment. It also fits select HL 100 and HL 270 series gearboxes. While primarily for the WG family, it may be cross-compatible with WG180 and WG200 models when used with the correct 4475280018 SCREW PLUG and housing adapters. Always verify spline count and pilot bearing dimensions before installation.

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