ZF 5838.300.061 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 5838.300.061 SPUR GEAR is a precision-engineered component designed for the planetary gear sets within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transfers rotational force between shafts, ensuring smooth power flow and torque multiplication during gear shifts. As a critical element of the gear train, it meshes directly with adjacent planetary gears and the differential assembly. The SKU 5838.300.061 is manufactured to ZF’s exacting tolerances, guaranteeing minimal backlash and extended service life in heavy-duty applications. When replacing this gear, it is common to also inspect the 5838109007 DIFFERENTIAL for wear, as both components share load paths in the final drive.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn gear teeth create irregular contact patterns, producing a distinct high-pitched whine that intensifies under load. This is a classic sign of spur gear fatigue.
• Intermittent gear slipping or delayed engagement: As the spur gear loses tooth profile, the transmission may hesitate before engaging a gear, especially in WG100 models operating under heavy torque.
• Metallic debris in transmission fluid: Flaking or pitting on the gear surface sheds fine metal particles into the oil, often visible during routine fluid changes. This debris can damage the 0750117075 TAPER ROLLER BEARING if not addressed promptly.
• Vibration in the driveline: Uneven tooth wear causes rotational imbalance, transmitting vibration through the output shaft and differential housing.

Technical Specifications

Compatibility

This spur gear is specifically engineered for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with certain variants of the WG180 and WG200 series where the planetary gear set uses identical tooth geometry. Always verify the spline count and bore diameter against your existing gear. When servicing the gear train, consider replacing the 2095209019 DIFFERENTIAL and the 0631329086 SPRING PIN that secures the gear to the shaft, as these parts experience correlated wear.

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