ZF 4699.302.122 DRIVE PINION for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.302.122 DRIVE PINION is a critical power-transfer component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part, identified by SKU 4699.302.122, sits at the input shaft interface, converting rotational force from the engine into precise gear engagement within the planetary gearset. As the primary torque receiver, it directly interfaces with the 4699100080: BASIC GEARBOX assembly, ensuring seamless power flow. Precision-ground teeth and hardened steel construction guarantee minimal backlash and maximum load capacity under heavy-duty industrial cycles.

Symptoms of Failure

When the 4699.302.122 DRIVE PINION begins to degrade, operators often notice distinct operational anomalies. Common failure indicators include:

• Whining or grinding noise during acceleration – Worn pinion teeth create audible metal-on-metal contact, especially under load.
• Intermittent gear slipping under torque – A damaged pinion loses tooth engagement, causing the transmission to momentarily lose drive power.
• Metallic debris in transmission fluid – Flaking or chipped pinion material contaminates the oil, often visible during routine drain inspections.
• Vibration at specific RPM ranges – Uneven tooth wear induces harmonic vibrations that resonate through the driveline.

Technical Specifications

Compatibility

This drive pinion is specifically designed for ZF’s WG-series industrial transmissions. Verified compatible models include WG100, WG130, and WG131. It may also be suitable for select WG180 and WG200 variants when used with the correct 0630000091: SHIM RING for axial clearance adjustment. Always confirm tooth profile and spline count against your existing assembly. For proper sealing, pair this pinion with a new 0634309122: SHAFT SEAL and 0634801038: SEALING RING to prevent lubricant loss.

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