ZF 4699.804.133 GK25 | OEM Genuine Part

Overview

The ZF 4699.804.133 GK25 is a precision-engineered OEM genuine gear set designed for the power-dense GK25 transmission assembly. As a critical component within the gearbox, this part functions as the primary reduction stage, transferring torque from the engine to the driveline in heavy-duty construction machinery. The SKU 4699.804.133 is specifically machined to ZF’s exacting tolerances, ensuring seamless meshing with the 4699004121: GK25 assembly. It sits directly between the 4699101098: HOUSING and the 4699102146: INPUT shaft, where it modulates rotational speed and torque output for demanding earthmoving applications.

Symptoms of Failure

When the ZF 4699.804.133 gear set begins to degrade, operators often notice intermittent gear slipping under load during excavation or grading operations. A second common failure sign is metallic grinding noises from the transmission housing, particularly when shifting between forward and reverse. Over time, worn teeth can cause erratic hydraulic pressure fluctuations in the clutch packs, leading to delayed engagement. Finally, visible metal particles in the transmission oil filter indicate advanced wear of this gear set, requiring immediate replacement to prevent cascading damage to the 4699103059: OUTPUT shaft assembly.

Technical Specifications

Compatibility

This genuine ZF part is engineered for the GK25 transmission family, which is widely deployed in ZF WG180, WG200, and WG210 series power shift transmissions. It is also compatible with select models in the ZF 4WG-200 and 5WG-300 ranges used in wheel loaders, dozers, and excavators. For proper fitment, always verify the transmission serial number against the OEM parts catalog. The gear set works in conjunction with the 4699101098: HOUSING and 4699102146: INPUT components to maintain correct gear lash and bearing preload.

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