ZF 6029.201.912 PLUG for WG90/WG94 | OEM Genuine Part

Overview

The ZF 6029.201.912 PLUG is a critical sealing component engineered specifically for the WG90 and WG94 transmission series. This OEM genuine part functions as a hydraulic or oil gallery plug, preventing pressurized fluid from escaping the valve body or housing assembly. Installed within the transmission’s internal circuit, it maintains proper lubrication and clutch application pressure. The SKU 6029.201.912 is manufactured to ZF’s exacting tolerances, ensuring a leak-proof seal under high thermal and mechanical loads. When replacing this plug, it is common to also inspect the 4661301047: HOUSING II for cracks or wear, as the plug seats directly into this component.

Symptoms of Failure

• Hydraulic fluid seepage around the transmission housing: A worn or cracked plug allows oil to escape, leaving visible drips on the bell housing or under the vehicle.
• Erratic gear engagement or delayed shifting: Loss of line pressure due to a leaking plug causes soft shifts or hesitation when moving from neutral to drive.
• Low transmission fluid level without external pan leaks: The plug failure can cause internal cross-leaks, leading to unexplained fluid loss and eventual overheating.
• Whining or cavitation noise from the pump: Air ingress through a compromised plug aerates the fluid, producing a high-pitched sound during operation.

Technical Specifications

Compatibility

This plug is designed for ZF WG series powershift transmissions, specifically the WG90 and WG94 models. It is also commonly used in the WG180, WG200, and WG210 variants where identical port configurations exist. Always verify the plug location within the 4661101032: TRANSMISSION HOUSING before installation. For proper assembly, ensure the 0631306174: CYLINDRICAL PIN is aligned correctly, and that the 4661301093: TUBE is free of debris to prevent seal damage.

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