Overview
The ZF 4699.001.185 GK10LD is a genuine OEM gear kit specifically engineered for the transfer case and final drive assembly within heavy-duty construction machinery transmissions. This critical component facilitates the precise reduction and distribution of torque from the driveline to the axle, ensuring reliable power delivery under extreme loads. The SKU 4699.001.185 is designed to maintain the exact gear ratios specified by ZF, preventing drivetrain binding and premature wear. It sits directly between the 4699102172: INPUT shaft and the 4699103057: OUTPUT assembly, working in concert with the 4699101108: HOUSING to seal the lubricated gear train.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn gear teeth on the 4699.001.185 produce a distinct high-pitched whine that increases with engine RPM, often mistaken for wheel bearing noise.
- Intermittent gear slipping under load: When the gear faces wear beyond tolerance, the transmission may momentarily lose torque transfer when climbing grades or moving heavy material, causing a sudden RPM surge.
- Metallic debris in transmission fluid: Pitting or spalling on the gear flanks sheds fine metallic particles into the oil, which can be observed during routine drain intervals or when inspecting the magnetic drain plug.
- Oil leaks near the output flange: Excessive gear play can stress the adjacent 4699105096: TURNTABLE BEARING, leading to seal distortion and fluid seepage around the housing joint.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.001.185 (GK10LD) |
| Gear Type | Helical, case-hardened steel |
| Module | 4.5 mm (estimated) |
| Number of Teeth | 37 (drive) / 12 (pinion) |
| Weight | 2.85 kg (6.28 lbs) |
| Material | 20MnCr5 carburized steel |
| OEM Reference | ZF 4699.001.185 |
| Surface Hardness | 58-62 HRC |
Compatibility
This gear kit is primarily designed for ZF WG180, WG200, and WG210 series transmissions used in wheel loaders, telehandlers, and excavators. It is also compatible with certain ZF Ergopower and Ecolife off-highway variants that utilize the GK10LD final drive reduction set. Always verify the transmission serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101108 | HOUSING | Encloses and supports the gear train |
| 4699102172 | INPUT | Transfers engine torque into the gear set |
| 4699103057 | OUTPUT | Delivers reduced speed to the axle |
| 4699105096 | TURNTABLE BEARING | Supports rotating loads and alignment |
| 0501329881 | HOUSING COVER | Seals the gear cavity from contamination |
| 0630513065 | SNAP RING | Secures bearings on the shaft |
| 0634306309 | O-RING | Prevents oil leaks at mating surfaces |
| 0637885612 | BREATHER | Equalizes internal pressure |
| 0769100082 | TYPE PLATE | Identifies transmission model and specs |
| 4699302299 | DRIVE PINION | Engages with the gear kit for torque transfer |
