Overview
The ZF 4644.153.470 CLUTCH is a critical torque-transfer component engineered for the WG 180 and WG 200 series transmissions. Positioned within the planetary gear set, this OEM genuine part modulates power flow between the engine and the drivetrain, enabling smooth gear engagement and disengagement. As a direct replacement for the SKU 4644.153.470, it ensures precise hydraulic actuation and minimal power loss during heavy-duty operations. This clutch assembly works in concert with the 4644101160 TRANSMISSION HOUSING to maintain structural integrity under high torque loads.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn friction plates cause sluggish shifts or abrupt clunking when the clutch fails to lock properly.
- Transmission slipping under load: The clutch loses holding capacity, leading to RPM flare without corresponding vehicle acceleration, especially during uphill climbs.
- Oil contamination from burnt debris: Overheated clutch material breaks down, turning transmission fluid dark and producing a burnt odor.
- Erratic hydraulic pressure fluctuations: Internal seal failure within the 4644.153.470 unit causes inconsistent clutch pack application, triggering fault codes in the TCU.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 4644.153.470 |
| OEM Reference | ZF 4644.153.470 |
| Material | Steel hub with sintered bronze friction lining |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness (pack) | 45 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| Seal Type | PTFE lip seal integrated |
Compatibility
This clutch is specifically designed for ZF WG 180 and WG 200 series transmissions, including the WG 201 variant. It is a direct fit for models such as the WG 180-2, WG 200-2, and WG 201-3. The 4644.153.470 also serves as a replacement in certain ZF 4HP and 5HP series when used in off-highway applications. Always verify your transmission serial number against the 4644301323 TRANSMISSION HOUSING compatibility chart to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses the clutch assembly and gear train |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG 200 series |
| 4644301189 | THREADED BUSH | Provides mounting point for clutch piston |
| 4475280043 | SCREW PLUG | Seals hydraulic passages in the clutch drum |
| 0634306198 | O-RING | Prevents fluid leakage between clutch pack and housing |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 4644301161 | COVER PLATE | Protects clutch access port from debris |
| 0636100621 | HEXAGON SCREW | Fastens clutch pack retaining ring |
| 0631610020 | SET SCREW | Locks clutch hub to shaft |
| 0501218540 | BREATHER | Equalizes pressure inside the clutch housing |
