ZF 4699.825.104 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.104 GP25 is a critical planetary gear set assembly engineered for heavy-duty construction machinery transmissions. Positioned within the main drive train, this OEM genuine part facilitates precise torque multiplication and speed reduction, ensuring smooth power delivery from the engine to the wheels. The SKU 4699.825.104 is specifically designed to interface with the HOUSING and INPUT shafts, forming the core of the gear reduction system. Manufactured to ZF’s exacting tolerances, this component guarantees reliable performance under extreme loads and continuous operation in demanding environments like excavators and wheel loaders.

Symptoms of Failure

When the ZF 4699.825.104 GP25 begins to wear, operators may notice distinct operational issues. Intermittent gear slipping under load is a primary indicator, often accompanied by a grinding noise during acceleration. Metal shavings in the transmission oil suggest internal gear tooth degradation, which can lead to catastrophic failure if ignored. Another common symptom is erratic shifting or delayed engagement, particularly when transitioning between forward and reverse gears. Finally, vibration through the driveline at specific RPM ranges often points to worn planetary bearings within this assembly.

Technical Specifications

Compatibility

This GP25 assembly is primarily compatible with ZF WG180 and WG200 series transmissions, commonly found in construction machinery from manufacturers like Liebherr, Caterpillar, and Volvo. It also fits select WG160 models when paired with the correct OUTPUT shaft adapter. For optimal performance, always verify your transmission model against the part number. The 4699.825.104 is not interchangeable with earlier GP20 variants due to differences in spline count and housing bore dimensions.

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