Overview
The ZF 4644.152.402 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. Positioned within the planetary gear set assembly, this OEM genuine part engages and disengages power flow between the engine and the driveline, enabling smooth gear shifts and reliable load holding under heavy-duty industrial conditions. The SKU 4644.152.402 is a direct replacement for the original factory-installed clutch, ensuring exact fitment and performance specifications are maintained. This component works in concert with the 4644101160 TRANSMISSION HOUSING and the 4644301323 TRANSMISSION HOUSING to form a sealed, high-pressure hydraulic circuit that actuates the clutch pack.
Symptoms of Failure
When the ZF 4644.152.402 clutch begins to wear, operators will notice several distinct performance issues. Transmission gear slipping under load is the most common symptom, where the transmission unexpectedly drops out of gear during acceleration or uphill travel. Another frequent failure sign is delayed or harsh engagement when shifting from neutral to drive or reverse, often accompanied by a noticeable clunk. Hydraulic fluid contamination from clutch plate debris can also occur, leading to erratic shift patterns and reduced line pressure. Finally, overheating of the transmission oil is a clear indicator that the clutch is dragging or not fully disengaging, causing excessive friction and thermal stress on adjacent components like the 4644301189 THREADED BUSH.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4644.152.402 |
| Clutch Type | Multi-disc, wet clutch |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Material | Sintered bronze friction plates / steel separator plates |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF WG 180 / WG 200 series |
| Sealing Requirement | Compatible with 0634306198 O-RING |
Compatibility
This clutch is designed for use in ZF WG 180 and WG 200 series transmissions, including the WG 201 variant. It is a direct fit for the WG 201 Series category under which this part is listed. The 4644.152.402 clutch is also compatible with earlier WG 180 models that utilize the same hydraulic clutch pack configuration. For proper installation, ensure the transmission housing is free of debris and that the 4475280043 SCREW PLUG is torqued to factory specifications to prevent fluid leaks. This part is not interchangeable with the smaller WG 120 series clutches.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses the clutch assembly and supports gear shafts |
| 4644301323 | TRANSMISSION HOUSING | Secondary housing section for clutch pack alignment |
| 4644301189 | THREADED BUSH | Provides wear-resistant mounting point for clutch piston |
| 4475280043 | SCREW PLUG | Seals hydraulic passages to maintain clutch actuation pressure |
| 0634306198 | O-RING | Prevents oil leakage between clutch housing and piston |
| 0730365067 | TYPE PLATE | Identification plate for transmission model verification |
| 4644301161 | COVER PLATE | Protects clutch access port from contamination |
| 0636100621 | HEXAGON SCREW | Secures clutch pack retaining ring in place |
| 0631610020 | SET SCREW | Adjusts clutch piston travel distance |
| 0501218540 | BREATHER | Equalizes internal pressure to prevent clutch seal damage |
