Overview
The ZF 4660.274.016 COUPLING is a critical OEM genuine component engineered for the WG 92 and WG 98 transmission series. This precision-machined coupling serves as the primary torque transfer interface between the transmission output shaft and the driveline, ensuring smooth power delivery under heavy-duty industrial loads. As part number 4660.274.016, it integrates directly with the 4660101017 TRANSMISSION HOUSING and the 4660301054 HOUSING II to maintain concentric alignment and vibration dampening. This coupling is designed to withstand extreme torsional stress while maintaining precise rotational balance, making it indispensable for ZF WG series transmissions operating in construction, mining, and material handling equipment.
Symptoms of Failure
- Transmission oil leaks at the coupling housing interface – Worn seals or cracked coupling flanges allow hydraulic fluid to escape, often visible as drips near the bell housing area.
- Gear slipping under load or erratic shifting – A degraded coupling loses its ability to maintain consistent torque transfer, causing intermittent power loss during acceleration or uphill operation.
- Abnormal vibration or driveline shudder – Excessive play in the coupling splines or rubber element produces low-frequency vibrations felt through the chassis, especially at highway speeds.
- Metallic grinding noises during engagement – When the coupling’s internal splines wear, you may hear a distinct grinding sound when shifting between forward and reverse gears.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4660.274.016 |
| Material | High-tensile alloy steel with nitrided surface |
| Outer Diameter | 180 mm |
| Inner Diameter (Spline) | 65 mm |
| Overall Length | 95 mm |
| Weight | 3.2 kg |
| OEM Reference | ZF 4660.274.016 |
| Torque Capacity | 2,800 Nm (estimated) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is specifically designed for ZF WG 92 and WG 98 series transmissions, including models such as WG180, WG200, WG210, and WG220. It also fits select WG 98 variants used in off-highway vehicles. For proper installation, ensure the 0631306174 CYLINDRICAL PIN is correctly aligned, and verify the 0769123894 TYPE PLATE matches your transmission’s serial number. This part is not backward-compatible with older WG 80 series without additional adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301054 | HOUSING II | Secondary housing for clutch pack assembly |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for coupling positioning |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 0750100022 | SCREW PLUG | Seals hydraulic passages during service |
| 4660221029 | SUCTION TUBE | Oil pickup for pump lubrication circuit |
| 0634100317 | O-RING | Static seal for coupling-to-housing joint |
| 0636103273 | CAP SCREW | Fastener for coupling retention |
| 0634306311 | O-RING | Secondary seal for hydraulic pressure |
| 4660321029 | FIXING PLATE | Locks coupling to output shaft |
