Overview
The ZF 4644.152.476 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. As a friction-based coupling element, the 4644.152.476 clutch ensures smooth gear shifts and reliable power delivery under heavy industrial loads. The SKU 4644.152.476 is precision-machined to ZF’s exacting tolerances, making it a direct replacement for worn units in WG 201 series applications. When installed alongside the 4644101203 TRANSMISSION HOUSING or the 4644301382 TRANSMISSION HOUSING, this clutch maintains the structural integrity required for high-torque operations.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4644.152.476 clutch often causes noticeable hesitation or jerking when shifting between forward and reverse gears, particularly under load.
- Transmission oil contamination: Friction material shedding from the clutch plate can produce dark, metallic debris in the fluid, leading to clogged filters and reduced lubrication efficiency.
- Slipping under acceleration: When the clutch fails to hold torque, the transmission may exhibit RPM flare without corresponding vehicle speed increase, especially during uphill climbs or heavy hauling.
- Unusual whining or grinding noises: Worn clutch discs can generate high-pitched sounds from the transmission housing, often accompanied by vibration in the shift lever or chassis.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.152.476 |
| OEM Reference | ZF 4644.152.476 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 152 mm (estimated) |
| Inner Diameter | 76 mm (estimated) |
| Thickness | 4.8 mm (estimated) |
| Weight | 0.85 kg (1.87 lbs) |
| Torque Capacity | Up to 1,200 Nm (estimated) |
Compatibility
This clutch is designed for ZF WG 180 and WG 200 series transmissions, including the WG 201 variant. It is a direct fit for models such as the WG 180, WG 200, and WG 201, where it replaces the original clutch pack. The 4644.152.476 is also compatible with certain ZF Ecomat and Ecolife derivatives that share the same planetary gear architecture. For proper installation, ensure the 4644301189 THREADED BUSH and 0636302005 SCREW PLUG are inspected and replaced if necessary to prevent fluid leaks and maintain clamping force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101203 | TRANSMISSION HOUSING | Encloses and supports the clutch assembly |
| 4644301382 | TRANSMISSION HOUSING | Alternative housing for WG 200 series |
| 4644301189 | THREADED BUSH | Provides threaded mounting point for clutch pack |
| 0636302005 | SCREW PLUG | Seals hydraulic passages in the clutch circuit |
| 0634306198 | O-RING | Prevents fluid leakage between clutch components |
| 0634801098 | SEALING RING | Ensures pressure integrity in the clutch piston |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures clutch pack alignment during assembly |
| 4644301161 | COVER PLATE | Protects clutch from debris and contamination |
| 0636100621 | HEXAGON SCREW | Fastens clutch components to the transmission housing |
