ZF 2099.346.051 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2099.346.051 SPUR GEAR is a critical power transmission component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part (SKU: 2099.346.051) sits within the gear train assembly, directly meshing with the 2099364014 CROWN WHEEL to transfer rotational force from the input shaft to the differential system. Precision-machined from case-hardened steel, this spur gear ensures smooth torque delivery and minimal backlash under heavy loads. It works in concert with the 2099109002 DIFFERENTIAL to maintain driveline integrity in industrial machinery.

Symptoms of Failure

• Whining or grinding noise during acceleration: Worn gear teeth create irregular contact patterns, producing a high-pitched whine that intensifies under load. This is a classic sign of pitting or spalling on the spur gear surface.
• Vibration in the transmission housing: Excessive backlash from a degraded 2099.346.051 spur gear causes harmonic vibrations felt through the chassis, often mistaken for bearing failure.
• Metal debris in transmission oil: Flaking or chipped teeth shed ferrous particles into the lubricant, visible during oil changes as metallic sludge. This accelerates wear on the 2099209001 DIFFERENTIAL and surrounding components.
• Intermittent gear slipping under torque: Advanced wear reduces tooth engagement, causing momentary power loss when climbing grades or hauling heavy loads.

Technical Specifications

Compatibility

This spur gear is specifically designed for ZF WG100, WG130, and WG131 transmissions. It also fits select variants of the WG180 and WG200 series when used with the correct 2098309010 DIFFERENTIAL HOUSING. Always verify tooth count and spline interface before installation. For WG200 applications, confirm compatibility with the 2098309032 DIFFERENTIAL BEVEL GEAR to ensure proper mesh alignment.

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