ZF 4644.120.210 PRESSURE REGULATOR for WG200 | OEM Genuine Part

Overview

The ZF 4644.120.210 PRESSURE REGULATOR is a critical hydraulic control component engineered specifically for the WG200 series transmission. This OEM genuine part precisely modulates oil pressure within the valve body, ensuring consistent clutch pack engagement and smooth gear shifts. As a direct-fit replacement, the SKU 4644.120.210 restores the transmission’s hydraulic balance, preventing erratic shifting behavior. This regulator works in conjunction with the 4644101216 TRANSMISSION HOUSING and the 4644301223 TRANSMISSION HOUSING to maintain proper fluid routing and pressure integrity.

Symptoms of Failure

• Delayed or harsh shifting – A worn pressure regulator causes inconsistent hydraulic pressure, leading to jarring gear changes or noticeable lag when accelerating.
• Transmission oil leaks near the valve body – Internal seal degradation on the 4644.120.210 allows ATF to bypass, resulting in visible drips or puddles under the vehicle.
• Gear slipping under load – When the regulator fails to maintain adequate pressure, the transmission may slip out of gear during uphill climbs or heavy towing.
• Erratic shift timing – The transmission may shift too early or too late, often accompanied by a fluctuating tachometer reading.

Technical Specifications

Compatibility

This pressure regulator is primarily designed for the ZF WG200 series transmissions, including models WG180, WG200, and WG210. It also fits select variants of the Ecomat 4HP and 5HP series where the valve body configuration matches. Always verify the 0730365067 TYPE PLATE on your transmission housing to confirm exact model compatibility. The regulator mounts directly to the valve body using a 0631311009 GROOVED STUD for secure positioning.

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