Overview
The ZF 4661.271.007 CLUTCH is a critical torque-transfer component engineered specifically for the WG 90 and WG 94 series transmissions. This OEM genuine part sits within the planetary gear set assembly, where it engages and disengages power flow between the input shaft and the intermediate shaft. As a friction-based coupling device, the 4661.271.007 clutch ensures smooth gear shifts and reliable power delivery under heavy-duty industrial loads. When paired with the 4661101033 HOUSING and the 4661301096 HOUSING, this clutch forms the core of the transmission’s shifting mechanism. The SKU 4661.271.007 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in WG 94 applications.
Symptoms of Failure
- Delayed or harsh gear engagement — When the 4661.271.007 clutch wears, you may notice a noticeable lag or a jarring thud when shifting between forward and reverse gears, particularly under load.
- Transmission slipping under torque — A worn clutch disc or piston seal causes the transmission to slip during acceleration, leading to RPM flare without corresponding vehicle speed increase.
- Contaminated transmission fluid with metallic debris — Friction material shedding from the clutch pack produces fine metal particles in the oil, often visible during routine fluid changes.
- Intermittent loss of drive in specific gear ranges — Failure of this clutch can cause a complete loss of power transfer in certain gear ratios, requiring immediate replacement to avoid secondary damage to the 6073003011 CONTROL UNIT.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4661.271.007 |
| OEM Reference | ZF 4661.271.007 |
| Material | Sintered steel friction discs with organic facing |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness (assembled) | 32 mm (estimated) |
| Weight | 1.8 kg (estimated) |
| Operating Pressure | 12–18 bar |
| Temperature Range | -20°C to +120°C |
Compatibility
This clutch is primarily designed for the ZF WG 94 series, but it also fits the WG 90 and WG 180 models due to shared clutch pack dimensions. It is commonly used in WG 94, WG 180, and WG 200 transmissions found in heavy-duty trucks, construction equipment, and agricultural machinery. Always verify the clutch stack height against your transmission’s service manual. For complete assembly, this part works in conjunction with the 4656183200 LOOSE PARTS kit, which includes necessary seals and snap rings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656183200 | LOOSE PARTS | Seals, snap rings, and hardware for clutch assembly |
| 6073003011 | CONTROL UNIT | Electro-hydraulic valve body managing clutch engagement |
| 4661101033 | HOUSING | Front clutch housing for WG 94 series |
| 4661301096 | HOUSING | Rear clutch housing supporting the output shaft |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for clutch pack assembly |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Oil drain plug for clutch housing |
| 4660201008 | SCREW PLUG | Pressure test port plug |
| 0636100117 | SCREW PLUG | Vent plug for clutch housing |
| 0501211384 | VALVE | Modulating valve for clutch pressure control |
