Overview
The ZF 4699.825.076 GP25 is a precision-engineered genuine OEM part designed for the clutch pack assembly within ZF heavy-duty powershift transmissions. This component, identified by SKU 4699.825.076, functions as a critical friction element responsible for transferring torque between rotating shafts during gear engagement. It sits directly within the planetary gear set, where it modulates hydraulic pressure to ensure smooth shifting under extreme load conditions. As a direct replacement for the original factory unit, this GP25 plate maintains the exact material composition and dimensional tolerances required for reliable operation in construction machinery applications.
Symptoms of Failure
When the ZF 4699.825.076 GP25 begins to wear, operators typically notice delayed gear engagement when shifting from neutral to drive or reverse. A second common failure sign is intermittent transmission slipping under heavy load, particularly when climbing grades or moving dense materials. You may also detect contaminated transmission fluid with a burnt odor, indicating the friction material has degraded. Finally, erratic shift patterns or harsh engagement during low-speed maneuvering often point to this GP25 plate losing its clamping force.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4699.825.076 |
| Type | GP25 Friction Plate |
| Outer Diameter | 225 mm |
| Inner Diameter | 165 mm |
| Thickness | 3.5 mm (new) |
| Material | Sintered Bronze on Steel Core |
| Weight | 0.45 kg |
| OEM Reference | ZF 4699.825.076 |
Compatibility
This GP25 plate is engineered for use in ZF WG180, WG200, and WG250 series transmissions commonly found in wheel loaders, graders, and dump trucks. It also fits select models of the ZF 4WG-200 and 6WG-200 powershift units. Always verify your transmission serial number before ordering, as internal clutch pack configurations vary by build year.
Installation Notes
During replacement, inspect the 4699025041 GP25 companion plate for scoring or heat discoloration. The 4699101070 HOUSING must be free of cracks, while the 4699102105 INPUT shaft splines should show no wear. Verify that the 4699103104 OUTPUT hub rotates freely before reassembly. Torque all fasteners to factory specifications using a calibrated wrench.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699025041 | GP25 | Companion friction plate for clutch pack |
| 4699101070 | HOUSING | Transmission case section |
| 4699102105 | INPUT | Input shaft assembly |
| 4699103104 | OUTPUT | Output shaft assembly |
| 4699109043 | BRAKE PARTS | Parking brake components |
| 4699301146 | HOUSING | Rear housing section |
| 4699309085 | HOUSING COVER | Access cover for clutch pack |
| 0636101411 | CAP SCREW | M10 x 30mm mounting bolt |
| 0631302212 | CYLINDRICAL PIN | Alignment dowel pin |
| 0634801038 | SEALING RING | O-ring for hydraulic seal |
