ZF 5838.300.030 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 5838.300.030 SPUR GEAR is a precision-machined component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational force between parallel shafts within the gear train, directly influencing torque delivery and driveline synchronization. As a critical element in the power flow path, the spur gear (SKU 5838.300.030) ensures smooth engagement and minimal backlash during load shifts. When installed alongside the 5838109007 DIFFERENTIAL, it maintains consistent gear mesh under high-stress conditions. The gear’s hardened tooth profile is designed to withstand continuous operation in heavy-duty industrial applications.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn tooth surfaces on the 5838.300.030 spur gear produce a distinct high-pitched whine that intensifies under load, often misdiagnosed as bearing noise.
• Vibration in the transmission housing: Excessive tooth wear or pitting causes irregular rotation, transmitting vibration through the case and into the driveline at specific RPM ranges.
• Metallic debris in the oil pan: Flaking or spalling of the gear teeth sheds ferrous particles into the lubricant, which can be detected during routine oil changes or filter inspections.
• Intermittent gear slippage under torque: Advanced wear reduces tooth contact area, leading to momentary loss of power transfer when climbing grades or hauling heavy loads.

Technical Specifications

Compatibility

This spur gear is specifically designed for ZF WG100, WG130, and WG131 transmissions. It is also compatible with select variants of the WG180 and WG200 series where the gear ratio and shaft spacing match. For proper installation, the gear must be paired with the correct 0750117075 TAPER ROLLER BEARING to support axial and radial loads. In differential assemblies, it works in conjunction with the 2095209019 DIFFERENTIAL unit. Always verify the tooth count and bore dimensions against your existing gear before ordering. The 0631329086 SPRING PIN is required to secure the gear to its shaft in most applications.

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