ZF 4644.151.475 CLUTCH for WG 180/WG 200 | OEM Genuine Part

Overview

The ZF 4644.151.475 CLUTCH is a critical torque-transfer component designed for the WG 180 and WG 200 series transmissions. This OEM genuine part sits within the planetary gear set assembly, engaging and disengaging power flow between the input shaft and the transmission housing. As a direct replacement for the WG 201 Series, the SKU 4644.151.475 ensures precise hydraulic actuation and reliable load holding under heavy industrial duty cycles. When paired with a robust TRANSMISSION HOUSING, this clutch maintains consistent clamping force to prevent driveline interruptions.

Symptoms of Failure

When the 4644.151.475 clutch begins to wear, operators may notice specific performance degradation. Oil leaks near the bell housing often appear as the first sign, caused by degraded sealing rings or piston wear. Gear slipping under load is another common symptom, where the transmission momentarily loses drive torque during acceleration or hill climbing. Delayed engagement or harsh shifting occurs when the clutch fails to fully disengage, leading to grinding noises or jerky starts. Finally, erratic pressure fluctuations in the hydraulic circuit can indicate internal leakage past the clutch piston seals, requiring immediate inspection of the TRANSMISSION HOUSING for scoring or warpage.

Technical Specifications

Compatibility

This clutch is engineered for the ZF WG 180 and WG 200 series transmissions, commonly found in medium-duty trucks, buses, and construction equipment. It is a direct fit for the WG 201 Series variant, which shares the same clutch pack dimensions and hydraulic circuit. The part also cross-references with earlier WG 160 models when used with the appropriate THREADED BUSH and SCREW PLUG for pressure port sealing. Always verify your transmission serial number before ordering to ensure correct spline count and plate stack height.

Related Components