ZF 4699.025.042 GP25 | OEM Genuine Part

Overview

The ZF 4699.025.042 GP25 is a precision-engineered OEM genuine part designed for the internal clutch pack and gear train assembly within ZF heavy-duty powershift transmissions. This component, identified by SKU 4699.025.042, functions as a critical pressure plate or reaction hub, ensuring proper clamping force and torque transfer during gear engagement. It sits directly between the rotating clutch drums and the friction discs, making it essential for maintaining hydraulic pressure integrity. When paired with the 4699101070: HOUSING and the 4699102105: INPUT shaft assembly, this part forms the core of the forward-reverse shifting mechanism in construction machinery transmissions.

Symptoms of Failure

• Delayed engagement or gear slipping under load: When the GP25 wears, the clutch pack loses clamping force, causing the transmission to slip during acceleration or under heavy digging loads.
• Low hydraulic pressure warnings or erratic shifting: A worn 4699.025.042 can cause internal leakage, triggering pressure drop codes in the TCU and resulting in harsh or missed shifts.
• Metallic debris in transmission fluid: Friction material from the GP25 surface contaminates the oil, often visible during filter inspections or oil changes.
• Overheating in the transmission sump: Slipping clutches generate excess heat, leading to elevated oil temperatures and potential damage to the 4699109043: BRAKE PARTS assembly.

Technical Specifications

Compatibility

This genuine GP25 component is specifically engineered for ZF powershift transmissions commonly used in construction machinery. It is a direct fit for the following ZF transmission models: WG180, WG200, WG210, and WG220 series. It also applies to select 4WG-200 and 6WG-200 variants found in wheel loaders, graders, and telehandlers. For proper installation, ensure the 4699103104: OUTPUT shaft and the 4699101070: HOUSING are inspected for wear simultaneously.

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