ZF 5838.300.727 INNER GEAR RING for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 5838.300.727 INNER GEAR RING is a critical planetary component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part functions as the internal splined ring that meshes directly with the planetary gear set, transferring torque from the sun gear to the output shaft within the differential assembly. As a wear-sensitive element, the 5838.300.727 ensures precise gear alignment and load distribution across the transmission’s power flow. When paired with a 5838109019: DIFFERENTIAL, this inner gear ring maintains the structural integrity required for heavy-duty industrial applications.

Symptoms of Failure

• Intermittent gear slipping under load: A worn inner gear ring loses tooth engagement, causing sudden power loss during acceleration or uphill operation.
• Metallic grinding noise from the transmission housing: Damaged splines or pitted surfaces produce a distinct whining or grinding sound, especially in lower gears.
• Contaminated transmission fluid with metal particles: As the gear ring degrades, microscopic steel shavings appear in the oil, often visible during routine drain intervals.
• Erratic shifting or delayed engagement: Excessive backlash from a worn ring gear forces the transmission to hunt for proper gear ratios, leading to harsh shifts.

Technical Specifications

Compatibility

This inner gear ring is designed exclusively for ZF’s WG-series powershift transmissions. Verified fitment includes the WG100, WG130, and WG131 models commonly used in agricultural tractors, wheel loaders, and industrial forklifts. The 5838.300.727 also integrates with the 2093209024: DIFFERENTIAL assembly in these transmissions. For proper installation, ensure the 0750117075: TAPER ROLLER BEARING is correctly seated, and secure the assembly using the 0631329088: SPRING PIN to prevent axial movement.

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