ZF 4699.825.222 GP25 | OEM Genuine Part

Overview

The ZF 4699.825.222 GP25 is an OEM genuine gearset component engineered for the demanding environments of construction machinery. This precision-machined part sits within the planetary gear train of ZF heavy-duty transmissions, where it manages torque distribution and rotational speed reduction. The SKU 4699.825.222 specifically refers to a hardened steel GP25 assembly that interfaces directly with the 4699025085 GP25 to form a matched set. Its role is critical in converting high-speed engine input into usable low-speed, high-torque output for wheel loaders, graders, and dump trucks.

Symptoms of Failure

When the ZF 4699.825.222 GP25 wears out, operators typically notice these specific failure modes:

• Erratic gear engagement under load – The transmission hesitates or clunks when shifting between forward and reverse, often accompanied by a grinding noise from the planetary section.
• Metallic debris in transmission fluid – Worn gear teeth shed fine metal particles, visible during oil changes or on the magnetic drain plug.
• Oil seepage near the bell housing – Deterioration of the sealing surfaces allows ATF to leak past the 4699101156 HOUSING interface, leaving puddles under the machine.
• Reduced power to the wheels – The transmission slips under heavy load, causing the engine to rev without proportional vehicle movement.

Technical Specifications

Compatibility

This GP25 gearset is designed for ZF WG series transmissions commonly used in construction machinery. It is a direct fit for the following models:

• ZF WG180 (all variants)
• ZF WG200 (early and late production)
• ZF WG210 (with specific clutch pack configuration)
• ZF 4WG-200 (4-speed versions)

Installation requires careful alignment with the 4699102095 INPUT shaft and the 4699103075 OUTPUT flange. Always replace the associated sealing components during overhaul to prevent premature failure.

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