ZF 4699.825.236 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.236 GP25 is a critical OEM genuine component engineered for heavy-duty construction machinery transmissions. This part functions as a precision-machined gear or shift element within the planetary gearset assembly, directly influencing torque distribution and gear engagement. Positioned in the upper valve body or clutch pack region of the transmission, the SKU 4699.825.236 ensures synchronized power flow under extreme load conditions. Its robust metallurgy and tight tolerances are designed to withstand the high cyclic stresses common in excavators, wheel loaders, and graders.

Symptoms of Failure

When the ZF 4699.825.236 GP25 begins to wear, operators often notice intermittent gear slipping under load during uphill travel or heavy digging. Another common indicator is delayed or harsh shifting between forward and reverse, particularly when the transmission oil temperature rises above 90°C. You may also detect metallic debris in the transmission oil filter or a persistent whining noise from the transmission housing during deceleration. Ignoring these signs can lead to catastrophic planetary gear failure.

Technical Specifications

Compatibility

This GP25 component is primarily compatible with ZF WG180, WG200, and WG210 series transmissions used in construction machinery. It also fits select Ecomat 4HP and 6HP variants where the planetary carrier assembly shares the same spline geometry. Always verify your transmission model tag before ordering. For complete assembly, pair this part with the 4699025168 GP25 companion gear and the 4699101165 HOUSING to ensure proper alignment. The 4699102106 INPUT shaft and 4699103122 OUTPUT flange must also be inspected for wear during rebuild.

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