Overview
The ZF 4644.151.206 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 planetary gear set assembly, where it engages and disengages power flow between the input shaft and the transmission housing. The SKU 4644.151.206 ensures precise hydraulic actuation, allowing smooth gear changes under heavy industrial loads. When replacing this clutch, it is common to also inspect the 4644101080: TRANSMISSION HOUSING for wear, as the clutch pack seats directly against this structural component.
Symptoms of Failure
When the ZF 4644.151.206 clutch begins to fail, operators will notice distinct performance degradation. Common failure symptoms include:
- Delayed or harsh gear engagement – The transmission hesitates before engaging forward or reverse, often accompanied by a jarring shift.
- Oil leaks near the clutch housing – Worn seals allow transmission fluid to escape, leaving puddles under the vehicle and reducing hydraulic pressure.
- Gear slipping under load – The clutch fails to hold torque, causing the transmission to slip out of gear during acceleration or uphill operation.
- Burning smell from overheated friction material – Slipping generates excessive heat, producing a distinct burnt odor from the transmission vent.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.151.206 |
| OEM Reference | ZF 4644.151.206 |
| Material | Sintered bronze friction plates with steel separator discs |
| Outer Diameter | 206 mm (estimated) |
| Inner Diameter | 151 mm (estimated) |
| Weight | 2.8 kg (6.2 lbs) |
| Plate Count | 6 friction / 7 steel (typical for WG180) |
Compatibility
This clutch is designed for ZF WG 180 and WG 200 series transmissions, commonly found in heavy-duty trucks, buses, and construction equipment. It directly replaces the original clutch pack in WG180 models and is also compatible with WG200 variants that share the same planetary gear architecture. For proper installation, verify that the 4644301333: HOUSING is free of scoring, and ensure the 0730365125: TYPE PLATE matches your transmission serial number. The 0631311009: GROOVED STUD must also be torqued to specification during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101080 | TRANSMISSION HOUSING | Encloses and supports the clutch assembly |
| 4644301333 | HOUSING | Intermediate housing for clutch pack alignment |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for clutch pack retention |
| 0636305019 | SCREW PLUG | Seals hydraulic passages in the housing |
| 4644301247 | THREADED BUSH | Wear-resistant insert for clutch piston bore |
| 0634303485 | O-RING | Seals clutch piston to prevent fluid bypass |
| 4644106055 | SHIFT SYSTEM | Hydraulic valve body controlling clutch actuation |
| 4642306050 | COVER PLATE | Protects clutch pack from debris ingress |
| 4644306464 | GASKET | Seals cover plate to housing interface |
