ZF 4699.801.205 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.205 GK10 is a precision-engineered gear set assembly designed for the power-dividing section of heavy-duty ZF transmissions used in construction machinery. This OEM genuine part, identified by SKU 4699.801.205, sits directly within the transmission’s countershaft cluster, where it manages torque distribution between the input shaft and the output planetary stages. As a critical wear component, the GK10 ensures smooth power flow under extreme loads, and its failure often necessitates replacement alongside the 4699001205: GK10 companion gear to maintain proper gear mesh alignment.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn teeth on the 4699.801.205 produce a distinct high-pitched whine under load, often mistaken for bearing noise. This is a primary indicator of gear surface fatigue.
• Intermittent gear slipping under heavy load: When the GK10 loses tooth profile integrity, the transmission may momentarily lose torque transfer, especially when climbing grades or lifting heavy loads.
• Metallic debris in transmission oil: Flakes or small chips found during oil changes point directly to spalling on the gear flanks of this part.
• Vibration at specific RPM ranges: Uneven wear on the gear set creates harmonic vibrations that resonate through the driveline, often felt in the operator cab.

Technical Specifications

Compatibility

This OEM genuine part is engineered for use in ZF WG-series power-shift transmissions commonly deployed in wheel loaders, excavators, and telehandlers. Specifically, the 4699.801.205 is compatible with the ZF WG180, WG200, and WG211 transmission models. It also integrates into the ZF 4WG-200 and 5WG-200 series. When replacing this gear, technicians should inspect the 4699101095: HOUSING for cracks and verify the 4699102083: INPUT shaft splines for wear, as these components share the same lubrication circuit. Additionally, the 4699103067: OUTPUT flange must be checked for runout to prevent premature gear failure.

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