Overview
The ZF 4660.274.017 COUPLING is a critical driveline component engineered specifically for the WG 92 and WG 98 transmission series. This OEM genuine part functions as the primary torque-transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery under heavy-duty industrial loads. The SKU 4660.274.017 sits directly within the clutch housing assembly, where it absorbs torsional vibrations and maintains precise alignment during gear shifts. When paired with a robust 4660101017 TRANSMISSION HOUSING, this coupling guarantees reliable engagement across all operating temperatures.
Symptoms of Failure
- Transmission shudder during low-speed maneuvering: A worn 4660.274.017 coupling often causes noticeable vibration or jerking when moving from a standstill, especially under partial throttle.
- Delayed or harsh gear engagement: Operators may experience a pronounced lag or clunk when shifting between forward and reverse, indicating coupling spline wear.
- Oil contamination from coupling hub degradation: As the coupling material breaks down, metallic particles can enter the transmission fluid, leading to filter clogging and reduced hydraulic pressure.
- Audible clicking or knocking from the bell housing: A loose or fatigued coupling produces a distinct metallic noise during acceleration or deceleration, often mistaken for universal joint failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (OEM) | 4660.274.017 |
| Outer Diameter | 185 mm |
| Inner Diameter (Spline) | 42 mm |
| Overall Length | 95 mm |
| Material | High-strength alloy steel with nitrided surface |
| Weight | 2.8 kg |
| Torque Capacity | 1,200 Nm |
| OEM Reference | ZF 4660.274.017 |
Compatibility
This coupling is engineered for the ZF WG 92 and WG 98 transmission families, which are widely used in municipal trucks, refuse vehicles, and medium-duty construction equipment. It is directly compatible with models including WG92, WG98, WG120, WG150, WG180, and WG200. The 4660.274.017 coupling interfaces seamlessly with the 4660301054 HOUSING II and is secured using a 0631306174 CYLINDRICAL PIN for precise alignment. Always verify the 0769123894 TYPE PLATE on your transmission to confirm model-specific fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Encloses and supports the gear train and coupling assembly |
| 4660301054 | HOUSING II | Secondary housing section that aligns the output shaft |
| 0631306174 | CYLINDRICAL PIN | Precision dowel pin for coupling-to-housing alignment |
| 0769123894 | TYPE PLATE | Identification plate with transmission model and serial number |
| 0750100022 | SCREW PLUG | Seals oil passages and inspection ports in the housing |
| 4660221029 | SUCTION TUBE | Draws transmission fluid from the sump to the pump |
| 0634100317 | O-RING | Seals the suction tube connection against leaks |
| 0636103273 | CAP SCREW | Fastens the coupling and housing components together |
| 0634306311 | O-RING | Provides a leak-proof seal between housing sections |
| 4660321029 | FIXING PLATE | Locks the coupling in position to prevent axial movement |
