Overview
The ZF 0501.214.125 COUPLING is a critical driveline component engineered specifically for the WG 131 Series transmission. This OEM genuine part functions as a torsional vibration damper and torque transfer interface between the engine output and the transmission input shaft. By absorbing rotational irregularities and reducing shock loads, the coupling ensures smooth power delivery and protects downstream transmission components from premature wear. The SKU 0501.214.125 is a direct replacement unit that maintains factory-specified damping characteristics and fatigue life. When installed alongside the 4656101028: TRANSMISSION HOUSING, this coupling ensures proper alignment and concentricity within the bell housing assembly.
Symptoms of Failure
- Transmission gear slipping under load: A worn coupling can cause intermittent torque loss, leading to gear disengagement or hesitation during acceleration, especially in heavy-duty applications.
- Abnormal low-frequency vibration at idle: Deteriorated rubber or elastomeric elements in the coupling produce a distinct shudder or rumble felt through the chassis when the transmission is in gear but stationary.
- Oil seepage from the front seal area: Cracks or deformation in the coupling hub can compromise the seal surface, resulting in ATF leaks near the 4656301066: HOUS.FRONT SECT interface.
- Metallic clicking during gear changes: Excessive backlash from a fatigued coupling creates audible impact noises as the driveline lash is taken up during shifts.
Technical Specifications
| Part Number | 0501.214.125 |
| OEM Reference | ZF 0501.214.125 |
| Material | High-tensile steel hub with nitrile rubber damping element |
| Outer Diameter | 195 mm |
| Overall Length | 85 mm |
| Bolt Hole Pattern | 6 x M12 on 160 mm PCD |
| Weight | 2.8 kg |
| Max Torque Capacity | 1,200 Nm |
| Temperature Range | -40°C to +120°C |
Compatibility
This coupling is designed for the ZF WG 131 Series transmission family, which includes models such as WG131, WG180, and WG200. It is also compatible with select variants of the WG150 and WG250 series where the input shaft diameter and bolt pattern match. The part interfaces directly with the 4656201015: SCREEN SHEET for debris filtration and the 4656301037: TUBE for lubrication flow routing. Always verify your transmission serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656301066 | HOUS.FRONT SECT | Front section housing input shaft and coupling |
| 4656201015 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301037 | TUBE | Oil delivery conduit for clutch pack |
| 0634313514 | O-RING | Seals coupling-to-housing interface |
| 0636100803 | CAP SCREW | M12 bolt for coupling retention |
| 4656301042 | HOUSING REAR PART | Rear casing section for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M10 bolt for front housing |
| 0636100160 | CAP SCREW | M8 bolt for screen sheet |
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