Overview
The ZF 4660.172.016 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 hydraulic pressure to control gear selection and power flow. Designed to withstand high cyclic loads and thermal stress, the 4660.172.016 ensures precise shifting under demanding industrial conditions. The SKU 4660.172.016 is manufactured to ZF’s original specifications, guaranteeing a direct fit and consistent performance in heavy-duty applications. This clutch works in concert with the 4660101020: TRANSMISSION HOUSING to maintain proper alignment and oil circulation within the assembly.
Symptoms of Failure
When the ZF 4660.172.016 clutch begins to wear, operators will notice distinct performance degradation. Delayed or harsh engagement between gears is a primary indicator, often accompanied by a noticeable shudder during acceleration. Intermittent gear slippage under load occurs as friction material loses its grip, causing the transmission to momentarily lose power transfer. Contaminated transmission fluid with metallic debris is a telltale sign of clutch plate degradation, visible during routine oil changes. Additionally, erratic shift patterns or failure to hold gear at highway speeds point directly to this component’s deterioration. Ignoring these symptoms can lead to secondary damage to the 4660301056: HOUSING II and surrounding hydraulic circuits.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4660.172.016 |
| OEM Reference | ZF 4660.172.016 |
| Material | Sintered steel friction plates with high-carbon steel separator plates |
| Outer Diameter | 172 mm |
| Inner Diameter | 120 mm |
| Total Thickness (stacked) | 38.5 mm |
| Weight | 1.85 kg |
| Operating Pressure | 12–18 bar |
| Temperature Range | -20°C to +120°C |
Compatibility
This clutch is a direct replacement for ZF WG 92 and WG 98 series transmissions, which are widely used in municipal trucks, refuse vehicles, and medium-duty construction equipment. While primarily designed for these two models, the 4660.172.016 also fits select variants of the WG180 and WG200 series where the clutch pack configuration matches. Always verify your transmission’s serial number against ZF’s application guide. For proper installation, ensure the 0631306174: CYLINDRICAL PIN is correctly aligned to prevent rotational misalignment. After replacement, affix the 0769123894: TYPE PLATE to document the service date and part number for future maintenance tracking.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101020 | TRANSMISSION HOUSING | Encloses and supports the clutch assembly and gear train |
| 4660301056 | HOUSING II | Secondary housing section for hydraulic valve body mounting |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise clutch pack positioning |
| 0769123894 | TYPE PLATE | Identification tag for transmission model and serial number |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports and drain openings |
| 4660221031 | SUCTION TUBE | Transports oil from sump to pump inlet |
| 0634100317 | O-RING | Seals clutch piston bore against fluid leakage |
| 0636103273 | CAP SCREW | Fastens clutch pack retaining plate to hub |
| 0634306311 | O-RING | Secondary seal for clutch drum pressure circuit |
| 4660321029 | FIXING PLATE | Locks clutch pack axial clearance during operation |
