Overview
The ZF 4644.153.088 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 output shaft. The SKU 4644.153.088 is precision-machined to ZF’s exacting tolerances, ensuring seamless hydraulic actuation within the transmission housing. When paired with a properly sealed 4644101160: TRANSMISSION HOUSING, this clutch maintains consistent oil pressure for reliable shifting under heavy industrial loads.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4644.153.088 clutch often causes noticeable hesitation when shifting from neutral to drive, or produces a jarring engagement as friction material degrades.
- Oil leaks near the bell housing: When the clutch piston seals fail, transmission fluid can escape past the assembly, leaving puddles under the vehicle and requiring immediate inspection of the 4644301323: TRANSMISSION HOUSING for damage.
- Slipping under load: Operators may notice the engine revving higher than normal without proportional acceleration, particularly when climbing grades or towing heavy loads—a classic sign of clutch plate wear.
- Burning smell from the transmission: Excessive heat generated by a slipping clutch produces a distinct burnt odor, often accompanied by darkened fluid on the dipstick.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.153.088 |
| OEM Reference | ZF 4644.153.088 |
| Material | High-carbon steel hub with sintered bronze friction lining |
| Outer Diameter | Approx. 180 mm |
| Inner Diameter | Approx. 120 mm |
| Thickness (assembled) | 28 mm |
| Weight | 2.4 kg (5.3 lbs) |
| Operating Pressure | 12–16 bar |
| Max Torque Capacity | 1,200 Nm |
Compatibility
This clutch is engineered for the ZF WG 180 and WG 200 series transmissions, including the WG 201 variant. It is a direct replacement for units requiring internal clutch pack renewal. The 4644.153.088 interfaces with the 4644301189: THREADED BUSH for precise axial alignment and is secured using the 4475280043: SCREW PLUG to prevent fluid bypass. It is also compatible with earlier WG 180 iterations, though verification of spline count is recommended before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses the clutch assembly and maintains oil sump integrity |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG 200 series |
| 4644301189 | THREADED BUSH | Provides threaded mounting point for clutch piston |
| 4475280043 | SCREW PLUG | Seals hydraulic passages within the clutch drum |
| 0634306198 | O-RING | Prevents fluid leakage between clutch and housing |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644301161 | COVER PLATE | Protects clutch access port from debris |
| 0636100621 | HEXAGON SCREW | Secures clutch pack retaining ring |
| 0631610020 | SET SCREW | Locks adjustment mechanism for clutch clearance |
| 0501218540 | BREATHER | Equalizes internal pressure during clutch operation |
