ZF 0501.218.983 SCREW PLUG for WG100/WG130/WG131

Overview

The ZF 0501.218.983 SCREW PLUG is a precision-engineered sealing component designed for the lubrication and hydraulic circuits within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part functions as a threaded closure, typically located on the transmission housing or valve body, to seal fluid passages during assembly or service. The SKU 0501.218.983 ensures a leak-proof seal under high-pressure conditions, preventing contamination ingress and maintaining proper oil flow. When installed alongside the 4663101001: HOUSING, it secures critical fluid pathways, while the 0631306816: CYLINDRICAL PIN aligns adjacent components for precise fitment.

Symptoms of Failure

• Transmission fluid seepage around the plug threads – Visible oil droplets or wet spots on the housing exterior, often mistaken for gasket failure.
• Intermittent low hydraulic pressure warnings – A worn plug allows air ingress, causing erratic shift quality or delayed engagement.
• Contaminated fluid due to debris entry – Cracks or stripped threads on the 0501.218.983 permit dirt ingress, accelerating wear on the 4663301025: COVER and valve body.
• Noise during cold starts – Air drawn through a failing screw plug creates cavitation, leading to whining or grinding sounds from the pump.

Technical Specifications

Compatibility

This screw plug is engineered for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It is also suitable for select WG180 and WG200 variants where the same thread pitch and sealing interface are used. The part interfaces directly with the 0636100817: CAP SCREW in the same assembly, ensuring torque retention. Always verify the thread pattern against your existing plug before installation.

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