ZF 0736.304.109 SCREW PLUG for WG200 | OEM Genuine Part

Overview

The ZF 0736.304.109 SCREW PLUG is a critical sealing component engineered specifically for the WG200 series transmission. This OEM genuine part, identified by SKU 0736.304.109, functions as a threaded closure within the transmission housing to prevent fluid loss and maintain hydraulic pressure. It is typically installed in the lower sump area or side casing of the gearbox, where it seals access points used during assembly or maintenance. The screw plug works in conjunction with the TRANSMISSION HOUSING to ensure a leak-free environment, protecting internal components like the HOUSING from contamination and pressure drops.

Symptoms of Failure

When the ZF 0736.304.109 screw plug wears out or becomes damaged, operators may notice several distinct failure indicators. Common symptoms include:

• Oil seepage around the plug head – Visible fluid accumulation on the transmission exterior, often leading to low fluid levels and overheating.
• Hydraulic pressure loss during gear shifts – A worn seal can cause gradual pressure drops, resulting in delayed engagement or harsh shifting in the WG200.
• Contaminated transmission fluid – A compromised plug allows dirt and moisture to enter the system, accelerating wear on the GROOVED STUD and other precision parts.
• Audible whining or chattering – Air ingress through a failing plug can create cavitation noise, particularly under load.

Technical Specifications

Compatibility

This screw plug is primarily designed for the ZF WG200 series transmissions, including models such as WG180, WG200, and WG210. It is also compatible with certain ZF Ecomat and Ecolife variants that share the same housing architecture. The plug directly interfaces with the TRANSMISSION HOUSING and is often replaced alongside the TYPE PLATE during rebuilds. Always verify thread pitch and depth against your specific transmission model before installation.

Related Components