ZF 4699.804.054 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.054 GK25 is a precision-engineered gear kit designed for the intermediate shaft assembly within heavy-duty ZF powershift transmissions. This OEM genuine part ensures synchronized power delivery and torque distribution in demanding construction machinery applications. As a critical wear component, the SKU 4699.804.054 directly interfaces with the main housing assembly, working in tandem with the 4699101043 HOUSING and the 4699301106 HOUSING to maintain proper gear alignment and load-bearing capacity. When installed correctly, this GK25 gear set minimizes backlash and ensures smooth engagement across all forward and reverse ranges.

Symptoms of Failure

• Intermittent gear slipping under load: When the 4699.804.054 gear teeth wear unevenly, operators will notice sudden loss of drive power when climbing grades or pushing heavy loads, often accompanied by a distinct grinding noise from the transmission housing.
• Metallic debris in transmission fluid: Pitting or spalling on the gear flanks generates fine metal particles that contaminate the hydraulic circuit, leading to premature failure of adjacent components like the 4699301015 HOUSING COVER and seals.
• Hard shifting or delayed engagement: Worn gear profiles cause the synchronizer to struggle, resulting in a noticeable lag when shifting between ranges, particularly in cold weather conditions.
• Vibration and whining noise at specific RPMs: As the gear set loses its original tooth profile, harmonic vibrations transfer through the 4699301085 COVER, creating a high-pitched whine that intensifies with speed.

Technical Specifications

Compatibility

This GK25 gear set is specifically engineered for ZF WG180, WG200, and WG211 series powershift transmissions commonly found in wheel loaders, graders, and telescopic handlers. It also fits select variants of the ZF 4WG-200 and 6WG-200 models used in construction machinery from manufacturers such as Volvo, Liebherr, and Caterpillar. Always verify the transmission serial number against the OEM parts catalog before installation.

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