Overview
The ZF 4660.175.018 CLUTCH is a critical torque-transfer component engineered specifically for the WG 92 and WG 98 series transmissions. This OEM genuine part sits within the planetary gear set assembly, where it engages and disengages power flow between the engine and the drivetrain. The SKU 4660.175.018 is precision-machined to ZF’s exacting tolerances, ensuring reliable engagement under high-load industrial conditions. When installed alongside the 4660101017: TRANSMISSION HOUSING, this clutch forms the core of the shift system, managing torque distribution during gear changes.
Symptoms of Failure
- Delayed or harsh engagement: When the 4660.175.018 clutch wears, operators often notice a pronounced lag or jarring sensation when shifting between forward and reverse gears in WG 98 models.
- Torque converter shudder: A vibration felt through the chassis during low-speed maneuvers indicates the clutch friction material has degraded, causing intermittent slip.
- Contaminated transmission fluid: Dark, burnt-smelling oil with metallic particles suggests the clutch plates are shedding material, often accompanied by a gradual loss of hydraulic pressure.
- Inability to hold load on inclines: The vehicle may roll backward on slopes even with the transmission in gear, a clear sign the clutch pack can no longer maintain static torque.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.175.018 |
| OEM Reference | ZF 4660.175.018 |
| Material | Sintered bronze friction lining on hardened steel core |
| Outer Diameter | 175 mm |
| Inner Diameter | 118 mm |
| Thickness | 4.2 mm (new) |
| Weight | 0.85 kg |
| Spline Count | 18 internal splines |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This clutch is designed for the ZF WG 92 and WG 98 series transmissions, which are commonly found in heavy-duty mobile equipment such as forklifts, reach stackers, and terminal tractors. The 4660.175.018 also fits select variants of the WG 180 and WG 200 models when used with the correct 4660301054: HOUSING II adapter. Always verify the spline count and stack height against your transmission’s service manual. For proper alignment during installation, the 0631306174: CYLINDRICAL PIN must be seated correctly, and the 0769123894: TYPE PLATE should be consulted for the exact revision level of your unit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Encloses the gear train and clutch assembly |
| 4660301054 | HOUSING II | Intermediate housing supporting the clutch drum |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for clutch pack positioning |
| 0769123894 | TYPE PLATE | Identification tag for transmission model and serial number |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports on the valve body |
| 4660221029 | SUCTION TUBE | Draws oil from the pan to the pump |
| 0634100317 | O-RING | Seals the suction tube connection |
| 0636103273 | CAP SCREW | Fastens the clutch pressure plate |
| 0634306311 | O-RING | Seals the cap screw bore against fluid leaks |
| 4660321029 | FIXING PLATE | Retains the clutch pack in the drum |
