ZF 4644.330.231 WASHER for WG 180/WG 200 | OEM Genuine Part

Overview

The ZF 4644.330.231 WASHER is a precision-engineered sealing component designed for the WG 180 and WG 200 transmission series. This OEM genuine part, identified by SKU 4644.330.231, functions as a critical load-spreading and sealing interface between the transmission housing and the output flange assembly. Installed directly within the output shaft area, this washer prevents fluid migration and maintains correct axial clearance during high-torque operations. It is a direct replacement for the washer originally fitted in the TRANSMISSION HOUSING assembly, ensuring that the OUTPUT shaft maintains its precise positional tolerance under load.

Symptoms of Failure

When the ZF 4644.330.231 washer degrades, operators typically notice three distinct failure modes. First, oil weeping from the output flange area is common, as the washer loses its ability to seal against the OUTPUT FLANGE mating surface. Second, intermittent gear slippage under load occurs because the worn washer allows axial play in the output shaft, disrupting gear engagement. Third, metallic debris in the transmission fluid may appear as the washer material breaks down and circulates through the system. Fourth, increased vibration from the driveline signals that the washer has compressed beyond its service limit, allowing the HEXAGON SCREW fasteners to loosen over time.

Technical Specifications

Compatibility

This washer is specifically engineered for the ZF WG 180 and WG 200 transmission models. It is also compatible with the WG 65 Series category where it is currently listed, though its primary application remains in the heavy-duty WG 180 and WG 200 gearboxes. The part fits directly into the output shaft retention assembly and works in conjunction with the HEXAGON SCREW (0636011038) and the OUTPUT shaft component. For complete assembly integrity, always pair this washer with a new O-RING (0634313118) and O-RING (0634303718) during installation.

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