ZF 4699.302.257 DRIVE PINION for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.302.257 DRIVE PINION is a critical gear component engineered for the input shaft assembly in ZF WG100, WG130, and WG131 powershift transmissions. This OEM genuine part transmits rotational force from the torque converter directly into the planetary gearset, ensuring precise power delivery under heavy load conditions. As a hardened steel pinion, it maintains exact tooth geometry to prevent backlash and vibration. The SKU 4699.302.257 is manufactured to ZF’s original tolerances, making it a direct replacement for worn units. This pinion works in concert with the 4699101086 HOUSING and the 4699301223 HOUSING to form the sealed driveline core.

Symptoms of Failure

• Whining or grinding noise from transmission bell housing: Worn pinion teeth create a high-pitched metallic sound during acceleration, often misdiagnosed as bearing failure.
• Delayed engagement or gear slipping under load: Excessive pinion wear reduces tooth contact area, causing intermittent power loss when climbing grades or hauling.
• Metal debris in transmission fluid: Flaking or pitting on the pinion surface contaminates the oil, visible as glittery particles during drain intervals.
• Vibration through the shift lever or chassis: Uneven pinion wear induces driveline shudder at specific RPM ranges, worsening with transmission temperature.

Technical Specifications

Compatibility

This drive pinion is specifically designed for the ZF WG100, WG130, and WG131 series transmissions. It also fits select variants of the WG180 and WG200 models when used with the corresponding 0501323165 SHAFT SEAL and 0634303996 O-RING. Always verify the input shaft spline count and housing bore dimensions before installation. The pinion mounts directly into the 4699301222 COVER assembly, which requires a 0630513060 SNAP RING for axial retention.

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