ZF 6006.022.111 FS SG 6 S for WG180/WG200 | OEM Genuine Part

Overview

The ZF 6006.022.111 FS SG 6 S is a critical synchronizer assembly designed for heavy-duty WG180 and WG200 series transmissions. This OEM genuine part, identified by SKU 6006.022.111, functions as the primary engagement mechanism for the 6th speed gear set, ensuring smooth ratio changes under high torque loads. It sits directly on the main shaft within the transmission housing, interacting with the shift fork and clutch hub to lock the gear to the shaft. When paired with a robust TRANSMISSION HOUSING or a TRANSMISSION HOUSING, this component maintains precise alignment and prevents driveline vibration during operation.

Symptoms of Failure

• Grinding or clashing noises when shifting into 6th gear: Worn synchronizer rings fail to match shaft speeds, producing a distinct metallic grinding sound during engagement.
• Gear pop-out under load: A damaged 6006.022.111 unit can cause the 6th gear to disengage unexpectedly, especially during uphill climbs or heavy acceleration.
• Hard shifting or resistance in the shift lever: Internal wear on the synchronizer hub creates excessive friction, making it difficult to move the selector into the 6th gear position.
• Metallic debris in transmission oil: Friction material from the synchronizer cone sheds into the lubricant, often visible during drain intervals as fine silver particles.

Technical Specifications

Compatibility

This synchronizer assembly is engineered exclusively for ZF WG180 and WG200 series transmissions. It is a direct fit for models including WG180, WG180A, WG200, and WG200A, commonly found in municipal trucks, refuse vehicles, and construction equipment. The part interfaces directly with the TYPE PLATE identification system and requires the GROOVED STUD for proper shaft retention. Always verify your transmission serial number against the OEM parts catalog before installation.

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