ZF 4642.120.007 PRESSURE REGULATOR for WG150 | OEM Genuine Part

Overview

The ZF 4642.120.007 PRESSURE REGULATOR is a critical hydraulic control component engineered specifically for the WG150 series transmission. This OEM genuine part precisely modulates oil pressure within the valve body assembly, ensuring consistent clutch engagement and smooth gear transitions under varying load conditions. As a direct-fit replacement, the SKU 4642.120.007 maintains the exact flow characteristics required by ZF’s engineering standards, preventing pressure spikes that can damage internal seals. It sits directly in the main control circuit, interacting with the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING to create a sealed hydraulic environment.

Symptoms of Failure

• Erratic shift timing or gear slipping under load – A worn regulator cannot maintain steady pressure, causing delayed or harsh shifts, especially when towing or climbing.
• Hydraulic oil leaks around the valve body area – Internal seal degradation leads to external seepage, often visible as drips near the transmission pan or housing joints.
• Fluctuating transmission temperature readings – Improper pressure regulation forces the torque converter to work harder, generating excess heat and triggering thermal warnings.
• Whining or buzzing noise from the transmission pump – Cavitation occurs when the regulator fails to balance return flow, producing audible high-pitched sounds during operation.

Technical Specifications

Compatibility

This pressure regulator is designed for the ZF WG150 series but also fits select variants of the WG180 and WG200 transmissions when used with the correct 0730365125: TYPE PLATE for identification. It is compatible with WG150-2, WG150-3, and early WG180 models that share the same valve body architecture. Always verify the 0631311009: GROOVED STUD alignment during installation to ensure proper seating within the housing.

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