ZF 6006.022.181 FS SG 6 S for WG201 | OEM Genuine Part

Overview

The ZF 6006.022.181 FS SG 6 S for WG201 is a precision-engineered synchronizer assembly designed for the countershaft brake system within ZF’s WG series powershift transmissions. This OEM genuine part, identified by SKU 6006.022.181, sits directly in the transmission’s clutch pack housing, where it modulates hydraulic pressure to ensure smooth gear engagement under heavy load. It is a critical component for maintaining shift quality in construction and agricultural machinery, working in tandem with the TRANSMISSION HOUSING to contain hydraulic fluid and protect internal gears from contamination.

Symptoms of Failure

When the ZF 6006.022.181 synchronizer assembly wears out, operators typically notice three distinct failure modes. First, delayed or harsh gear engagement occurs as the unit loses its ability to modulate clutch pressure, often accompanied by a grinding noise during shifts. Second, intermittent transmission slipping under load becomes apparent, particularly when climbing grades or towing, as the assembly fails to maintain proper clutch lock-up. Third, hydraulic fluid contamination from worn internal seals can cause erratic shifting patterns, which is often misdiagnosed as a pump issue. If you observe these symptoms, inspect the TRANSMISSION HOUSING for scoring or cracks that may accelerate wear.

Technical Specifications

Compatibility

This genuine ZF part is engineered for the WG201 series, but it also cross-references with select models in the WG180, WG200, and WG210 families. It is specifically designed for transmissions with the FS SG 6 S shift pattern, commonly found in ZF’s 6-speed powershift units used in loaders, graders, and dump trucks. For proper installation, ensure the SCREW PLUG is torqued to 45 Nm and the SEALING RING is replaced simultaneously to prevent fluid bypass. Always verify your transmission’s serial number against the WG201 parts catalog before ordering.

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