Overview
The ZF 4644.153.409 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 transmission series. Positioned within the hydraulic control module of the gearbox, this OEM genuine part manages the engagement and disengagement of gear sets, ensuring smooth power delivery from the engine to the driveline. As a direct replacement for the original factory-installed unit, the SKU 4644.153.409 guarantees precise fitment and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Delayed or harsh gear engagement: When the clutch pack wears, operators often notice a lag between shifting and actual gear engagement, or a jarring “clunk” when the transmission finally catches.
- Torque converter shudder under load: A failing 4644.153.409 can cause noticeable vibration or shuddering during acceleration, particularly when towing or carrying heavy loads.
- Intermittent gear slipping: Worn clutch friction surfaces lead to momentary loss of power transfer, causing the engine RPM to spike without a corresponding increase in vehicle speed.
- Contaminated transmission fluid: Debris from a deteriorating clutch assembly often appears as metallic particles or dark discoloration in the oil, accelerating wear on other internal components.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.153.409 |
| OEM Reference | ZF 4644.153.409 |
| Material | High-carbon steel hub with sintered bronze friction lining |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness | 4.5 mm (estimated) |
| Weight | 0.85 kg (1.87 lbs) |
| Sealing Type | Integrated O-ring groove |
Compatibility
This clutch assembly is designed for the ZF WG 180 and WG 200 transmission families, including the WG 201 Series. It is also compatible with select WG 180 and WG 200 variants used in off-highway vehicles, agricultural tractors, and construction equipment. For precise fitment, always verify the transmission serial number against the OEM parts catalog. The TRANSMISSION HOUSING (4644101160) and TRANSMISSION HOUSING (4644301323) serve as the structural enclosure for this clutch, while the THREADED BUSH (4644301189) and SCREW PLUG (4475280043) secure the assembly within the transmission case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for the gearbox assembly |
| 4644301323 | TRANSMISSION HOUSING | Secondary housing section for clutch and valve body |
| 4644301189 | THREADED BUSH | Guides and aligns clutch pack during installation |
| 4475280043 | SCREW PLUG | Seals hydraulic passages within the clutch housing |
| 0634306198 | O-RING | Provides fluid seal between clutch and housing |
| 0730365067 | TYPE PLATE | Identification label for transmission model |
| 4644301161 | COVER PLATE | Protects clutch access opening from debris |
| 0636100621 | HEXAGON SCREW | Fastens housing sections together |
| 0631610020 | SET SCREW | Locks threaded bush in position |
| 0501218540 | BREATHER | Equalizes internal pressure in transmission |
