ZF 4699.825.244 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.244 GP25 is a critical OEM genuine gear set component engineered for the power flow path within heavy-duty ZF transmissions used in construction machinery. This part, identified by SKU 4699.825.244, functions as a primary reduction gear, transferring torque from the input shaft to the intermediate shaft assembly. It is precision-machined to maintain exact gear mesh tolerances, ensuring smooth power delivery under extreme load conditions. When paired with the 4699025164 GP25, this assembly forms the core of the transmission’s high-torque drive section.

Symptoms of Failure

When the ZF 4699.825.244 GP25 wears out, operators typically notice three distinct failure modes. First, intermittent gear slipping under load occurs, especially when climbing grades or hauling heavy payloads, as the gear teeth lose their hardened profile. Second, whining or grinding noises from the transmission housing become audible during acceleration, indicating excessive backlash. Third, metallic debris in the transmission fluid is a clear sign of spalling on the gear flanks. If you experience hard shifting between forward and reverse, inspect the 4699101154 HOUSING for cracks that may have allowed the gear to shift out of alignment.

Technical Specifications

Compatibility

This GP25 gear is designed for integration into ZF’s WG series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It is a direct fit for the ZF WG180 and WG200 series, as well as the heavy-duty WG310 models used in mining equipment. The part interfaces directly with the 4699102106 INPUT shaft and the 4699103122 OUTPUT shaft, making it essential for any rebuild of these transmission families. Always verify the gear ratio matches your specific transmission tag before installation.

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