ZF 5838.300.041 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 5838.300.041 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 parallel shafts, directly influencing gear ratio stability and torque distribution. Positioned within the intermediate shaft assembly, the 5838.300.041 spur gear ensures synchronized power flow during load shifts. Its hardened steel construction resists surface fatigue under continuous heavy-duty operation. When replacing this gear, always inspect the mating 5838109007 DIFFERENTIAL for wear patterns, as uneven tooth contact often indicates misalignment in the differential housing.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn gear teeth create irregular contact patterns, producing a distinct high-pitched sound that intensifies under load. This often signals pitting or spalling on the tooth flanks.
• Intermittent gear slipping under torque: When the spur gear loses tooth profile integrity, the transmission may momentarily lose power delivery, especially during uphill climbs or sudden throttle changes.
• Metallic debris in transmission fluid: Flakes or silver particles in the oil filter or drain plug indicate advanced gear degradation. This symptom frequently accompanies failure of the 0750117075 TAPER ROLLER BEARING, which supports the gear shaft.
• Vibration through the gearshift lever: Uneven gear rotation caused by tooth breakage or excessive backlash transmits vibration into the driveline, noticeable at specific RPM ranges.

Technical Specifications

Compatibility

This spur gear is engineered exclusively for ZF WG-series transmissions, specifically models WG100, WG130, and WG131. These units are commonly found in medium-duty trucks, construction loaders, and agricultural tractors. The gear interfaces directly with the 2095209019 DIFFERENTIAL assembly and is secured via a 0631329086 SPRING PIN that locks it to the shaft. Do not use this part in WG180 or WG200 transmissions, as those models utilize helical gears with different tooth profiles and shaft centers.

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