Overview
The ZF 4644.152.527 COUPLING is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part serves as the mechanical link between the engine output and the transmission input shaft, ensuring smooth power delivery and driveline alignment. Installed within the bell housing assembly, the 4644.152.527 coupling absorbs torsional vibrations and compensates for minor misalignment during operation. For technicians rebuilding a WG 180 or WG 200 unit, this coupling is often replaced in conjunction with the 4644105413 DISCONNECTION mechanism to ensure complete clutch-pack separation. The coupling also interfaces directly with the 4642303093 OUTPUT FLANGE, which transmits rotational force to the driveline.
Symptoms of Failure
- Driveline shudder during acceleration: A worn 4644.152.527 coupling causes noticeable vibration or shuddering when moving from a stop, particularly under heavy load in WG 180 and WG 200 transmissions.
- Metallic clicking or clunking sounds: As the coupling splines or rubber elements degrade, operators often report intermittent clicking noises from the bell housing area, especially during gear engagement or deceleration.
- Fluid contamination near the bell housing: A failing coupling can allow transmission fluid to migrate past the seal, leading to visible oil leaks at the joint between the engine and transmission—a classic symptom of coupling wear.
- Erratic gear engagement or delayed shifting: When the coupling loses its damping capacity, the transmission control unit may detect abnormal input shaft speeds, causing harsh or delayed shifts in WG 180 and WG 200 series units.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4644.152.527 |
| OEM Reference | ZF 4644.152.527 |
| Material | High-tensile steel hub with elastomeric damping insert |
| Outer Diameter | Approx. 180 mm |
| Inner Diameter (Spline) | Approx. 45 mm |
| Overall Length | 95 mm |
| Weight | 2.8 kg (6.2 lbs) |
| Torque Capacity | Up to 2,500 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This ZF 4644.152.527 COUPLING is designed for the WG 180 and WG 200 series transmissions, including all sub-variants such as the WG 180-6, WG 180-8, WG 200-6, and WG 200-8 models. It is also compatible with certain ZF Ecomat 4HP and 5HP series that share the same bell housing pattern. The coupling mounts directly to the 4644101222 TRANSMISSION HOUSING and is secured using 0636021010 HEXAGON SCREW fasteners. Always verify your transmission serial number against ZF parts catalogs before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105413 | DISCONNECTION | Clutch pack separation mechanism |
| 4642303093 | OUTPUT FLANGE | Driveline torque output connection |
| 0636021010 | HEXAGON SCREW | Fastener for coupling mounting |
| 4644101222 | TRANSMISSION HOUSING | Main structural casing |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant |
| 0730365067 | TYPE PLATE | Identification and rating label |
| 0631311009 | GROOVED STUD | Alignment and retention pin |
| 4644301298 | COVER PLATE | Protective access cover |
| 0634306525 | O-RING | Fluid seal for housing joints |
| 0636305026 | SCREW PLUG | Drain or fill port closure |
