Overview
The ZF 4699.001.080 GK10 is a genuine OEM transmission component engineered for heavy-duty construction machinery. This part functions as a critical interface within the gearbox assembly, ensuring precise alignment and load distribution during high-torque operations. Specifically, the GK10 designation indicates a gear kit or synchronizer assembly that manages power flow between the input shaft and planetary gears. The SKU 4699.001.080 is a direct replacement for original ZF factory parts, guaranteeing dimensional accuracy and metallurgical integrity. When installed correctly, this component reduces internal friction and maintains consistent gear engagement under extreme loads.
Symptoms of Failure
- Grinding noise during gear engagement: A worn GK10 assembly causes harsh metal-on-metal contact, particularly when shifting from neutral to drive in ZF WG-series transmissions.
- Intermittent power loss under load: If the part fails to lock properly, operators may experience sudden RPM spikes without corresponding vehicle movement, especially on inclines.
- Metallic debris in transmission fluid: Flaking or chipped gear teeth from a degraded 4699.001.080 will contaminate the oil, visible as glitter-like particles during routine fluid changes.
- Delayed or incomplete gear engagement: A failing GK10 can cause a 2-3 second lag between lever movement and actual gear selection, compromising operator control.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.001.080 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 120 mm |
| Internal Spline Count | 24 teeth |
| OEM Reference | ZF GK10 |
| Hardness | 58-62 HRC |
Compatibility
This genuine ZF 4699.001.080 GK10 is designed for use in the following transmission models commonly found in wheel loaders, graders, and telehandlers:
- ZF WG180
- ZF WG200
- ZF WG210
- ZF 4WG-200
- ZF 4WG-210
During installation, always inspect the 4699101080 HOUSING for cracks or wear, as misalignment here accelerates GK10 failure. The 0501329881 HOUSING COVER must be torqued to factory specs to prevent oil bypass. Use a new 0630513065 SNAP RING to secure the assembly axially, and replace the 0634306309 O-RING to eliminate leakage paths.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101080 | HOUSING | Encloses the GK10 and supports bearing preload |
| 0501329881 | HOUSING COVER | Seals the housing and retains lubricant |
| 0630513065 | SNAP RING | Locks the GK10 axially on the shaft |
| 0634306309 | O-RING | Prevents fluid leaks at the cover interface |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0501319149 | SCREW PLUG | Seals oil fill/drain ports |
| 0636302022 | SCREW PLUG | Secondary port sealing for pressure testing |
| 0634801038 | SEALING RING | Creates a static seal under high pressure |
| 0730365801 | TYPE PLATE | Identifies transmission model and serial number |
| 4699102154 | INPUT | Transfers engine torque to the GK10 assembly |
