ZF 2099.346.001 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2099.346.001 SPUR GEAR is a critical power transmission component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part functions as a direct-drive gear within the planetary gearset, transferring torque from the input shaft to the intermediate shaft assembly. The SKU 2099.346.001 is precision-machined to maintain exact gear mesh alignment, ensuring smooth power flow under heavy loads. It is commonly installed alongside the 2099109002: DIFFERENTIAL and the 2099364014: CROWN WHEEL in the final drive assembly.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn spur gear teeth produce a distinct high-pitched whine, especially under load, indicating uneven tooth contact or pitting.
• Vibration in the driveline at highway speeds: A failing 2099.346.001 gear causes harmonic vibrations that can be felt through the chassis, often misdiagnosed as a driveshaft issue.
• Metallic debris in transmission oil: Flakes or small chips in the fluid are a clear sign of gear tooth spalling, requiring immediate inspection of the spur gear and associated 2099209001: DIFFERENTIAL components.
• Intermittent gear slippage or harsh engagement: As the gear profile degrades, the transmission may struggle to maintain consistent torque transfer, leading to erratic shifting behavior.

Technical Specifications

Compatibility

This spur gear is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in the secondary reduction stage. The gear interfaces directly with the 2098309010: DIFFERENTIAL HOUSING and requires proper shimming with the 12883200682: THRUST WASHER for correct axial clearance. For high-mileage rebuilds, pairing this gear with a new 0635332059: BALL BEARING is recommended to prevent premature wear.

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