ZF 4699.804.062 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.062 GK25 is a precision-engineered gear kit designed for the forward clutch assembly in heavy-duty ZF powershift transmissions. This OEM genuine part, identified by SKU 4699.804.062, directly governs torque transfer from the engine to the driveline in construction machinery such as wheel loaders and graders. Positioned within the clutch pack housing, it synchronizes gear engagement under high load conditions. For proper sealing and structural integrity, this gear kit is installed in conjunction with the 4699101043 HOUSING and the 4699301106 HOUSING, which protect the internal components from debris and hydraulic pressure.

Symptoms of Failure

• Delayed or harsh shifting: When the 4699.804.062 gear teeth wear, you may experience a noticeable lag between gear selections or a jarring engagement, often described as “ZF transmission slipping under load.”
• Metallic grinding noise from the bell housing: Worn gears produce a distinct whine or grinding sound during acceleration, indicating imminent failure of the clutch pack assembly.
• Hydraulic fluid contamination: Debris from a failing gear kit can circulate through the transmission, clogging filters and causing erratic pressure drops. This is a common sign that the 4699301015 HOUSING COVER and 4699301085 COVER may also require inspection for cracks or warping.
• Loss of forward drive: In severe cases, the gear kit can strip entirely, resulting in a complete loss of forward motion while reverse remains functional.

Technical Specifications

Compatibility

This gear kit is engineered for ZF WG series transmissions commonly found in construction machinery. It is a direct fit for the following models:

• ZF WG180
• ZF WG200
• ZF WG210
• ZF 4WG-200

Always verify your transmission serial number before installation. The 4699101043 HOUSING and 4699301106 HOUSING must be inspected for wear when replacing this gear kit to ensure proper alignment.

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