ZF 4699.804.135 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.135 GK25 is a critical OEM genuine gear set component engineered for heavy-duty construction machinery transmissions. Positioned within the planetary gear train of ZF’s advanced drive systems, this part facilitates precise torque multiplication and smooth power distribution from the engine to the final drive. The SKU 4699.804.135 is specifically designed to interface with the 4699004121: GK25 assembly, ensuring optimal gear meshing under extreme loads. As a direct replacement unit, it restores factory-spec performance in ZF transmissions used in wheel loaders, excavators, and telehandlers.

Symptoms of Failure

When the ZF 4699.804.135 wears out, operators often notice distinct operational issues. “Transmission gear slipping under load” is a primary indicator, where the machine loses power during heavy digging or lifting. Another common failure sign is “whining or grinding noise from the transmission housing”, particularly during gear shifts. “Delayed engagement when shifting from neutral to drive” also points to this part’s degradation. Additionally, “metal particles in the transmission fluid” can be detected during routine oil changes, signaling internal gear wear that requires immediate replacement of the 4699.804.135.

Technical Specifications

Compatibility

This ZF 4699.804.135 gear set is compatible with ZF’s WG series transmissions commonly found in construction machinery. It directly fits the WG180 and WG200 models, as well as the WG210 series used in mid-size wheel loaders. The part also integrates with the 4699101098: HOUSING and 4699102146: INPUT shafts in these assemblies. For output-side applications, pairing with the 4699103059: OUTPUT component ensures complete driveline integrity. Always verify your transmission model tag before ordering.

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