ZF 4699.298.052 PLANET GEAR SET for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.298.052 PLANET GEAR SET is a critical torque-multiplying assembly within the WG100, WG130, and WG131 series transmissions. This OEM genuine component houses the planetary pinions, needle bearings, and carrier that distribute load across the gear train during high-torque operations. As the central rotating element in the planetary stage, it directly transfers power from the turbine shaft to the output shaft. The SKU 4699.298.052 is precision-machined to ZF’s factory tolerances, ensuring seamless meshing with the sun gear and ring gear. When this planet gear set degrades, it introduces backlash and vibration that can cascade into catastrophic transmission failure if not addressed promptly.

Symptoms of Failure

• Whining or grinding noise during acceleration — Worn planet gear teeth or damaged needle bearings produce a distinct metallic whine that intensifies under load, often mistaken for wheel bearing noise.
• Erratic gear engagement or slipping — As the planet carrier loses its precise alignment, the transmission may hesitate or slip when shifting between forward and reverse, particularly in low-range operation.
• Metallic debris in transmission fluid — Flaking from the planet gear set’s hardened steel surfaces contaminates the hydraulic system, causing valve body sticking and clutch pack wear.
• Vibration at specific RPM ranges — Uneven wear on the planet pinions creates a rhythmic vibration felt through the chassis, typically between 1500-2500 RPM under moderate throttle.

Technical Specifications

Compatibility

This planet gear set is engineered specifically for ZF’s WG-series powershift transmissions. Verified compatible models include the WG100, WG130, and WG131. It also fits select variants of the WG180 and WG200 series when used with the appropriate 4699298049: HOUSING KIT. Always verify your transmission’s serial number against ZF’s parts catalog, as planetary gear ratios vary between WG models. The assembly requires the 4699309123: HOUSING COVER for proper sealing and alignment during installation.

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