ZF 5838.300.031 SPUR GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 5838.300.031 SPUR GEAR is a precision-machined OEM component engineered for the auxiliary drive train within ZF WG100, WG130, and WG131 transmissions. This gear transfers rotational force from the input shaft to the countershaft assembly, ensuring synchronized power distribution under heavy load. As a genuine ZF part, SKU 5838.300.031 guarantees exact fitment and metallurgical integrity, reducing backlash and extending service intervals. It is frequently replaced alongside the 5838109007 DIFFERENTIAL and 0750117075 TAPER ROLLER BEARING during major overhauls.

Symptoms of Failure

• Whining or howling noise during deceleration: Worn gear teeth create irregular contact patterns, producing a distinct metallic whine that intensifies under load.
• Vibration in the driveline at highway speeds: Excessive tooth wear or pitting causes harmonic imbalance, felt as a low-frequency shudder through the chassis.
• Intermittent gear slipping under torque: Advanced wear reduces tooth engagement depth, leading to momentary power loss when climbing grades or towing.
• Metal debris in transmission oil: Flaking or spalling from the spur gear surface contaminates the lubricant, often visible during drain intervals.

Technical Specifications

Compatibility

This spur gear is designed exclusively for ZF WG-series transmissions. Verified compatible models include WG100, WG130, and WG131. It may also be used in certain WG180 and WG200 variants where the auxiliary drive layout matches. Always cross-reference the existing gear tooth count and bore diameter before installation. For differential-side repairs, pair this gear with the 2095209019 DIFFERENTIAL and secure it using the 0631329086 SPRING PIN to prevent axial movement.

Related Components