ZF 4644.151.440 CLUTCH for WG 180/WG 200 | OEM Genuine Part

Overview

The ZF 4644.151.440 CLUTCH is a critical torque-transfer component engineered for the WG 180 and WG 200 series transmissions. This OEM genuine part serves as the primary engagement mechanism, directly connecting the engine’s power to the gearset within the transmission housing. Positioned between the input shaft and the planetary gear assembly, the 4644.151.440 clutch modulates hydraulic pressure to enable smooth gear shifts and load holding. As a precision-machined assembly, it ensures minimal power loss and consistent performance under heavy-duty industrial applications. The SKU 4644.151.440 is factory-spec matched to ZF’s original design tolerances.

Symptoms of Failure

When the ZF 4644.151.440 clutch begins to wear, operators often notice specific operational degradation. Delayed or harsh engagement is a primary indicator, where the transmission hesitates before moving or slams into gear. Another common symptom is gear slipping under load, particularly when climbing grades or carrying heavy payloads, as the clutch fails to maintain frictional grip. Hydraulic fluid contamination from clutch plate debris can also occur, leading to erratic shift patterns. Finally, overheating of the transmission housing may develop due to excessive clutch slippage generating internal friction.

Technical Specifications

Compatibility

This clutch assembly is designed for ZF’s WG 180 and WG 200 transmission families. It is a direct fit for the WG 180, WG 200, and WG 201 Series models. The part also cross-references to certain WG 160 variants with matching spline counts. Always verify the clutch pack thickness and hub spline configuration against your specific transmission serial number before installation.

Related Components

When servicing the clutch, it is recommended to inspect and replace associated sealing and mounting hardware. The 4644101160: TRANSMISSION HOUSING provides the structural envelope for the clutch pack, while the 4644301323: TRANSMISSION HOUSING is an alternative casting variant. The 4644301189: THREADED BUSH secures the clutch piston, and the 4475280043: SCREW PLUG seals the hydraulic feed port. Additional hardware includes the 0634306198: O-RING for piston sealing, the 0730365067: TYPE PLATE for identification, the 4644301161: COVER PLATE for clutch access, the 0636100621: HEXAGON SCREW for housing fastening, the 0631610020: SET SCREW for adjustment, and the 0501218540: BREATHER for pressure equalization.