Overview
The ZF 4660.272.019 COUPLING is a critical driveline component engineered for the WG 92 and WG 98 series transmissions. This OEM genuine part serves as the primary mechanical link between the torque converter output and the transmission input shaft, ensuring precise torque transfer and rotational alignment. Positioned within the bell housing assembly, the coupling absorbs torsional vibrations and maintains drivetrain integrity under heavy loads. The SKU 4660.272.019 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or damaged units in commercial vehicle applications.
Symptoms of Failure
- Transmission gear slipping under load: A worn 4660.272.019 coupling can cause intermittent power loss, especially during acceleration or uphill driving, as the coupling fails to maintain a solid mechanical connection.
- Oil leaks near the bell housing: Deterioration of the coupling’s sealing surface often leads to transmission fluid seepage, visible as drips or wet spots around the housing joint.
- Abnormal vibration or shuddering: When the coupling’s damping properties degrade, drivers may experience noticeable driveline shudder during gear changes or at low RPMs.
- Metallic grinding noises: Advanced wear can produce a distinct grinding sound from the transmission area, indicating metal-on-metal contact between the coupling and adjacent components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.272.019 |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 65 mm (estimated) |
| Material | High-strength alloy steel with nitrided surface |
| Weight | 2.4 kg (estimated) |
| OEM Reference | ZF 4660.272.019 |
| Torque Capacity | Up to 2,500 Nm (estimated) |
Compatibility
This coupling is specifically designed for ZF WG 92 and WG 98 series transmissions, which are commonly found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with the WG180 and WG200 variants that share the same input shaft geometry. The part integrates directly with the 4660101017: TRANSMISSION HOUSING and the 4660301054: HOUSING II, forming the core structural assembly. For proper alignment, the 0631306174: CYLINDRICAL PIN must be installed correctly, and identification is verified via the 0769123894: TYPE PLATE.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301054 | HOUSING II | Secondary housing for clutch pack |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 0750100022 | SCREW PLUG | Seals oil passages in housing |
| 4660221029 | SUCTION TUBE | Oil pickup tube for pump |
| 0634100317 | O-RING | Seals suction tube connection |
| 0636103273 | CAP SCREW | Fastens housing sections |
| 0634306311 | O-RING | Seals cap screw bore |
| 4660321029 | FIXING PLATE | Retains coupling in position |
