ZF 4699.825.182 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.182 GP25 is a critical OEM genuine gear component engineered for heavy-duty construction machinery transmissions. This precision-machined part sits within the planetary gear set assembly, where it facilitates torque transfer and speed reduction under extreme load conditions. The SKU 4699.825.182 is specifically designed to interface with the 4699025014 GP25 unit, ensuring seamless power distribution across the drivetrain. As a factory-specification component, it maintains the exact tolerances required for ZF’s modular transmission architecture, reducing wear on adjacent HOUSING assemblies.

Symptoms of Failure

• Intermittent gear slipping under load – When the GP25 gear teeth wear unevenly, the transmission may momentarily lose engagement during excavation or grading operations, causing sudden power loss.
• Metallic grinding noise from the transmission housing – Worn splines on the 4699.825.182 produce a distinct high-pitched chatter during gear shifts, often misdiagnosed as bearing failure.
• Oil contamination with metallic debris – Flaking surface material from this gear can clog the hydraulic filter, leading to sluggish clutch engagement and reduced hydraulic pressure.
• Vibration during low-speed maneuvering – Uneven tooth contact patterns create harmonic vibrations that resonate through the INPUT shaft and OUTPUT shaft assemblies.

Technical Specifications

Compatibility

This GP25 gear is compatible with ZF WG180, WG200, and WG250 series transmissions commonly found in wheel loaders, telehandlers, and graders. It directly replaces the original equipment in power take-off (PTO) drive trains and countershaft assemblies. For complete rebuilds, pair this gear with the BRAKE PARTS kit and TORX SCREW fasteners to ensure proper preload. The 4699.825.182 also fits certain ZF 4WG-200 and 6WG-200 variants produced after 2010.

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