Overview
The ZF 4644.153.445 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. Positioned within the clutch pack assembly, this OEM genuine part manages the engagement and disengagement of power flow between the engine and the drivetrain. The SKU 4644.153.445 is precision-machined to ZF’s exacting tolerances, ensuring seamless shifting and load handling under high-stress industrial conditions. This clutch sits directly inside the transmission housing, working in concert with the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING to maintain structural integrity and hydraulic pressure.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4644.153.445 clutch wears, operators often notice a lag or jarring shift when moving between forward and reverse, especially under load.
- Torque converter shudder at low RPM: A worn clutch can cause vibration or shuddering during acceleration from a stop, indicating slipping friction surfaces.
- Hydraulic fluid contamination: Debris from a failing clutch plate can circulate through the system, leading to clogged valves and degraded performance in the 4475280043: SCREW PLUG and related passages.
- Intermittent power loss under heavy load: The clutch may fail to hold torque, causing the transmission to momentarily lose drive power when climbing or hauling.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.153.445 |
| OEM Reference | ZF 4644.153.445 |
| Material | High-carbon steel with sintered bronze friction lining |
| Outer Diameter | Approx. 245 mm |
| Inner Diameter | Approx. 160 mm |
| Thickness | 4.5 mm (new) |
| Weight | 1.2 kg |
| Torque Capacity | Up to 2,200 Nm |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This clutch is designed for ZF’s WG 180 and WG 200 transmission families, including the WG 201 Series. It is a direct fit for models such as the WG 180, WG 200, and WG 201, where it functions as the primary drive clutch. The part also integrates with the 4644301189: THREADED BUSH for precise alignment within the clutch drum. Always verify your transmission serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses and supports the clutch assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4644301189 | THREADED BUSH | Provides threaded mounting point for clutch drum |
| 4475280043 | SCREW PLUG | Seals hydraulic ports in the clutch circuit |
| 0634306198 | O-RING | Prevents fluid leaks at clutch piston seals |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644301161 | COVER PLATE | Protects clutch pack from external debris |
| 0636100621 | HEXAGON SCREW | Fastens clutch cover to housing |
| 0631610020 | SET SCREW | Locks threaded bush in position |
| 0501218540 | BREATHER | Equalizes pressure inside transmission case |
