Overview
The ZF 4644.152.475 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 transmission series. Positioned within the planetary gear set assembly, this OEM genuine part manages the engagement and disengagement of power flow between the input shaft and the output flange. The SKU 4644.152.475 ensures precise hydraulic actuation, enabling smooth gear shifts under heavy industrial loads. When installed alongside the 4644105413 DISCONNECTION unit, it forms the core of the transmission’s shifting logic, directly influencing driveline efficiency and operational longevity.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4644.152.475 clutch often causes a noticeable lag when shifting from neutral to drive, or produces a jarring thud during gear changes under load.
- Transmission fluid contamination: Friction material degradation from this clutch can shed particles into the oil, leading to clogged filters and accelerated wear on the 4642303093 OUTPUT FLANGE sealing surfaces.
- Torque converter shudder: As the clutch loses holding capacity, operators may feel a vibration or shudder during low-speed maneuvering, particularly in WG 180 applications.
- Intermittent power loss: Slipping under heavy throttle causes the engine RPM to rise without proportional vehicle acceleration, a classic sign of clutch pack fatigue in the WG 200 series.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.152.475 |
| OEM Reference | ZF 4644.152.475 |
| Material | Sintered bronze friction plates with steel separator discs |
| Outer Diameter | 152 mm (estimated) |
| Inner Diameter | 95 mm (estimated) |
| Total Thickness (pack) | 47.5 mm (assembled) |
| Weight | 2.3 kg (5.1 lbs) |
| Operating Pressure | 12-16 bar (hydraulic) |
Compatibility
This clutch assembly is designed for ZF WG 180 and WG 200 series transmissions, including all sub-variants such as WG 180-1, WG 180-2, WG 200-1, and WG 200-2. It is also compatible with certain ZF Ecomat 4HP and 5HP models that share the same clutch drum geometry. Always verify the spline count and stack height against your existing 4644101222 TRANSMISSION HOUSING before installation. For proper torque sequencing, use the 0636021010 HEXAGON SCREW kit specified for the clutch retaining plate.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105413 | DISCONNECTION | Hydraulic valve for clutch release |
| 4642303093 | OUTPUT FLANGE | Torque transfer to driveshaft |
| 0636021010 | HEXAGON SCREW | Clutch pack retention fastener |
| 4644101222 | TRANSMISSION HOUSING | Main structural casing |
| 4644301226 | TRANSMISSION HOUSING | Alternative housing variant |
| 0730365067 | TYPE PLATE | Identification and rating label |
| 0631311009 | GROOVED STUD | Alignment dowel for clutch drum |
| 4644301298 | COVER PLATE | Seals clutch pack access port |
| 0634306525 | O-RING | Hydraulic seal for piston bore |
| 0636305026 | SCREW PLUG | Oil gallery port closure |
