Overview
The ZF 4644.151.071 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part sits within the main drive assembly, directly engaging the planetary gear sets to manage power flow from the engine to the output shaft. The SKU 4644.151.071 identifies a factory-spec friction clutch pack that ensures precise hydraulic engagement and disengagement during gear shifts. When installed alongside the 4644101080: TRANSMISSION HOUSING, this clutch forms the core of the transmission’s load-bearing system, delivering reliable performance under high-torque industrial applications.
Symptoms of Failure
When the ZF 4644.151.071 clutch wears out, operators typically notice these specific failure indicators:
- Delayed or harsh gear engagement – The clutch pack loses friction material, causing a noticeable lag or jarring shift when moving from neutral to drive.
- Oil leaks near the bell housing – Worn seals within the clutch assembly allow transmission fluid to escape, often visible as drips under the vehicle.
- Gear slipping under load – The clutch fails to hold torque, causing the transmission to momentarily lose power during acceleration or uphill climbs.
- Burning smell from transmission fluid – Excessive heat from clutch slippage degrades the oil, producing a distinct acrid odor.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.151.071 |
| OEM Reference | ZF 4644.151.071 |
| Material | Sintered bronze friction plates with steel separator discs |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness (pack) | 35 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| Operating Pressure | 12–18 bar |
Compatibility
This clutch is designed for ZF WG 180 and WG 200 series transmissions, commonly found in heavy-duty trucks, construction equipment, and agricultural machinery. It directly replaces the original clutch pack in models such as the WG180, WG200, and their sub-variants (WG180-1, WG200-2). The part integrates with the 4644301333: HOUSING and requires proper alignment with the 0730365125: TYPE PLATE for correct installation. Always verify the 0631311009: GROOVED STUD is torqued to specification during reassembly to prevent premature wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101080 | TRANSMISSION HOUSING | Encloses and supports the clutch assembly |
| 4644301333 | HOUSING | Secondary housing for clutch pack retention |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Alignment fastener for clutch housing |
| 0636305019 | SCREW PLUG | Seals hydraulic passages in the clutch circuit |
| 4644301247 | THREADED BUSH | Provides wear-resistant thread for housing bolts |
| 0634303485 | O-RING | Prevents fluid leaks between clutch components |
| 4644106231 | SHIFT SYSTEM | Hydraulic actuator that engages the clutch pack |
| 4644306470 | GASKET | Seals the clutch housing to the transmission case |
| 4644306194 | COVER PLATE | Protects the clutch pack from debris ingress |
