ZF 4143.302.013 INPUT SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.302.013 INPUT SHAFT is a critical torque-transfer component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary rotational interface between the engine coupling and the planetary gearset, converting input speed and torque into controlled mechanical energy within the gearbox. The SKU 4143.302.013 is precision-machined to exacting ZF tolerances, ensuring minimal backlash and optimal power flow. It mounts directly into the 4143101009 HOUSING and is secured by the 4475280018 SCREW PLUG, forming a sealed, high-strength assembly that withstands continuous heavy-duty operation.

Symptoms of Failure

• Gear slipping under load: A worn input shaft spline or bearing journal causes intermittent disengagement, especially during uphill pulls or sudden acceleration.
• Transmission oil leaks at the bell housing: Degraded shaft surface or damaged seal contact area allows ATF to weep past the 0634313603 O-RING, leaving puddles under the vehicle.
• Vibration or whining noise from the front of the transmission: Uneven wear on the shaft’s pilot bearing surface creates harmonic oscillations that amplify through the driveline.
• Hard shifting or delayed engagement: A bent or twisted input shaft alters gear mesh alignment, causing harsh clutch pack engagement and erratic shift timing.

Technical Specifications

Compatibility

This input shaft is designed for ZF’s modular HL-series transmissions, specifically the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 series where the input spline count and pilot bearing diameter match. Always verify your transmission’s serial number against the OEM parts catalog. For a complete rebuild, pair this shaft with the 4143298457 SEAL KIT and the 0501342341 SUPPORT RING to restore factory sealing and alignment.

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