Overview
The ZF 4699.801.108 GK10 is a high-precision OEM genuine clutch pack assembly engineered for the demanding environment of construction machinery. This component functions as the primary torque-transfer interface within the planetary gearset, managing the engagement and disengagement of specific gear ratios. Positioned directly within the transmission’s hydraulic control circuit, the GK10 assembly ensures smooth power delivery under heavy loads. The SKU 4699.801.108 designates a factory-sealed unit with ZF’s proprietary friction material, designed to withstand extreme thermal cycling and high-pressure hydraulic actuation common in wheel loaders and graders.
This part is not a standalone friction disc but a complete pre-assembled kit containing steel separator plates, friction discs, and snap rings. It replaces worn-out clutch packs that have exceeded their service life, restoring the transmission’s ability to hold torque without slippage. The GK10 designation indicates a specific stack height and spline configuration unique to ZF’s modular transmission architecture.
Symptoms of Failure
When the ZF 4699.801.108 clutch pack deteriorates, operators will notice distinct performance degradation. Below are the most common failure indicators that signal immediate replacement is necessary:
- Transmission slipping under load in forward gears – The machine loses power when climbing slopes or pushing material, with engine RPM rising disproportionately to ground speed. This indicates the friction material has glazed or worn below the minimum thickness threshold.
- Delayed or harsh engagement when shifting from neutral to drive – A noticeable lag of 2-3 seconds followed by a jarring clunk suggests the clutch pack’s hydraulic piston is losing seal integrity or the friction discs have warped from heat damage.
- Dark, burnt-smelling transmission fluid with metallic particles – When the 4699.801.108 assembly sheds friction material, the debris contaminates the hydraulic circuit, causing valve body sticking and accelerated wear on adjacent planetary components.
- Intermittent loss of reverse gear function – The clutch pack responsible for reverse rotation fails to hold pressure, causing the machine to creep or fail to move backward entirely, especially after extended operation in high-temperature conditions.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4699.801.108 |
| Product Designation | GK10 Clutch Pack Assembly |
| Outer Diameter (Friction Disc) | 198.5 mm |
| Inner Diameter (Spline Hub) | 135.2 mm |
| Total Stack Height (Compressed) | 42.8 mm |
| Number of Friction Discs | 6 |
| Number of Steel Separators | 7 |
| Friction Material Type | Sintered Bronze on Steel Core |
| Maximum Operating Pressure | 18.5 bar |
| Weight (Assembled) | 2.45 kg |
| Seal Material | Nitrile Rubber (NBR) |
Compatibility
This genuine ZF 4699.801.108 GK10 clutch pack is engineered for use in the following ZF transmission models commonly deployed in construction machinery:
- ZF WG180 – Used in medium wheel loaders (e.g., 3-4 cubic meter buckets) and backhoe loaders requiring 180 kW power handling.
- ZF WG200 – Found in larger graders and articulated dump trucks, where the GK10 assembly manages the forward clutch circuit for the 2nd and 3rd gear ranges.
- ZF WG210 – Applied in heavy-duty telehandlers and compact crawlers, where the 4699.801.108 serves as the reverse clutch pack in the planetary gearset.
- ZF 4WG-200 – A four-speed powershift variant where this part is used in the clutch pack for the C3 clutch (direct drive) position.
Cross-reference this SKU with your transmission’s serial number to confirm stack height compatibility, as minor variations exist between early and late production runs of the WG200 series.
