Overview
The ZF 4644.151.228 COUPLING is a critical driveline component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part serves as the primary mechanical link between the transmission output shaft and the downstream drive system, ensuring precise torque transfer and rotational alignment. Located within the rear housing assembly, the coupling absorbs torsional vibrations and maintains concentricity during high-load operations. The SKU 4644.151.228 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Vibration during gear engagement: A worn 4644.151.228 coupling often produces noticeable driveline shudder or oscillation when shifting under load, particularly in WG 200 series units.
- Metallic clicking or clunking noises: As the coupling splines or elastomeric elements degrade, operators may hear distinct metallic sounds from the transmission rear section during acceleration or deceleration.
- Oil seepage near the output flange: A failing coupling can compromise the seal interface, leading to gradual ATF leakage around the housing joint—a common long-tail search query for “ZF WG200 oil leak output flange.”
- Intermittent power loss or slip: Excessive wear reduces torque transmission efficiency, causing hesitation or momentary loss of drive under heavy loads.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.151.228 |
| Material | High-strength alloy steel with elastomeric dampener |
| Outer Diameter | 180 mm (estimated) |
| Overall Length | 95 mm |
| Weight | 2.8 kg |
| OEM Reference | ZF 4644.151.228 (Genuine) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is designed for the ZF WG 180 and WG 200 transmission families. It is a direct replacement for units produced after 2010, including the WG 180-6, WG 200-6, and WG 200-8 variants. The part interfaces directly with the 4644101175: TRANSMISSION HOUSING and the 4644301221: TRANSMISSION HOUSING assemblies. During installation, technicians should also inspect the 0730365067: TYPE PLATE for correct model identification and ensure the 0631311009: GROOVED STUD is torqued to factory specifications. For complete assembly, verify compatibility with the 4644303060: COVER PLATE or 4644303061: COVER PLATE depending on your transmission variant.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101175 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301221 | TRANSMISSION HOUSING | Alternate housing variant for WG 200 |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Fastener for coupling-to-housing attachment |
| 4644303060 | COVER PLATE | Seals rear housing access port |
| 4644303061 | COVER PLATE | Alternate cover plate for different builds |
| 0634306525 | O-RING | Hydraulic seal between housing sections |
| 0636305026 | SCREW PLUG | Drain/fill port closure |
| 0501316470 | BREATHER | Pressure equalization vent |
| 4644301279 | SCREEN SHEET | Filter mesh for oil return circuit |
