Overview
The ZF 0501.223.643 INNER CLUTCH DISK is a critical friction component engineered for the WG65 series transmission. This OEM genuine part sits within the clutch pack assembly, where it transfers torque between rotating shafts during gear engagement. The SKU 0501.223.643 ensures precise fitment and durability under high thermal loads. When paired with a robust TRANSMISSION HOUSING, this disk maintains consistent hydraulic pressure and smooth shifting characteristics in heavy-duty applications.
Symptoms of Failure
- Delayed gear engagement or slipping under load — Worn friction material on the 0501.223.643 reduces clamping force, causing hesitation when accelerating or climbing grades.
- Burnt transmission fluid odor — Excessive heat from a failing inner clutch disk degrades the oil, producing a distinct acrid smell during operation.
- Erratic shift quality or shuddering — Uneven wear on the disk surface leads to vibration during gear changes, particularly in the WG65 series.
- Metal particles in the oil pan — Advanced wear sheds friction material and debris, which can be detected during routine fluid inspections.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.223.643 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness | 3.5 mm (new) |
| Weight | 0.45 kg |
| OEM Reference | ZF 0501.223.643 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This inner clutch disk is primarily designed for the ZF WG65 transmission series. Based on its construction and friction characteristics, it is also compatible with the WG180, WG200, and WG210 models that share the same clutch pack architecture. Always verify fitment by cross-referencing your transmission serial number with the 0501.223.643 SKU. For secure installation, use HEXAGON SCREW fasteners (0636011038) and HEXAGON SCREW (0636011118) to secure the clutch drum. The HEXAGON SCREW (0636016015) is also required for the pressure plate assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports the clutch pack assembly |
| 0636011038 | HEXAGON SCREW | Secures clutch drum to housing |
| 0636011118 | HEXAGON SCREW | Fastens pressure plate to hub |
| 0636016015 | HEXAGON SCREW | Mounts clutch pack retaining ring |
| 0631306085 | CYLINDRICAL PIN | Aligns clutch disk splines during assembly |
| 0634313118 | O-RING | Seals hydraulic feed passages |
| 0636304019 | SCREW PLUG | Closes oil gallery access ports |
| 0634801152 | SEALING RING | Prevents fluid bypass at piston bore |
| 0732611049 | FILTER INSERT | Traps debris from worn clutch material |
| 0634303718 | O-RING | Seals the clutch apply piston |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
