ZF 2094.304.040 GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2094.304.040 GEAR is a precision-engineered helical gear designed for the intermediate shaft cluster within ZF WG100, WG130, and WG131 heavy-duty transmissions. This OEM genuine part (SKU: 2094.304.040) is responsible for transferring torque from the input shaft to the main shaft assembly, ensuring smooth power flow during gear selection. Positioned directly between the 2094104412 MAIN SHAFT and the 2094304054 MAIN SHAFT, this gear meshes with the shift system to provide consistent rotational speed under load. Without this critical component, the transmission cannot maintain proper gear engagement or deliver reliable power to the driveline.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn gear teeth create a high-pitched metallic sound, especially noticeable in 3rd and 4th gears, indicating surface fatigue or pitting on the 2094.304.040 gear.
• Hard shifting or gear clash: When the gear profile degrades, synchronizers struggle to match speeds, causing grinding when engaging forward gears. This often accompanies a failing 2094106010 SHIFT SYSTEM.
• Metal debris in transmission oil: Flakes or fine metallic particles found during oil changes point directly to gear tooth spalling. This symptom accelerates wear on the 2094206001 GEARSHIFT SHAFT and adjacent bearings.
• Vibration through the gear lever: Uneven tooth wear causes radial runout, transmitting noticeable vibration into the cab during highway cruising.

Technical Specifications

Compatibility

This gear is specifically engineered for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 series where the intermediate shaft cluster uses a 40-tooth helical gear. Always verify your transmission serial number before ordering. The gear interfaces directly with the 2094104412 MAIN SHAFT and the 2094304054 MAIN SHAFT, and works in concert with the 2094106010 SHIFT SYSTEM for proper engagement.

Related Components

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