ZF 4644.138.012 FILTER for WG 180/WG 200 | OEM Genuine Part

Overview

The ZF 4644.138.012 FILTER is a critical hydraulic filtration component engineered for the WG 180 and WG 200 series transmissions. This OEM genuine part ensures the removal of particulate contaminants from the transmission fluid, safeguarding the valve body and torque converter from abrasive wear. Positioned within the oil sump or return line circuit, the SKU 4644.138.012 maintains fluid cleanliness to prevent clogging of internal passages. For optimal sealing integrity, this filter is often replaced alongside the 4644101216: TRANSMISSION HOUSING or the 4644301223: TRANSMISSION HOUSING, as housing distortion can compromise filter fitment.

Symptoms of Failure

• Delayed or harsh gear engagement: A clogged filter restricts oil flow, causing hesitation when shifting from neutral to drive or reverse.
• Transmission overheating: Restricted fluid circulation forces the system to work harder, leading to elevated operating temperatures.
• Whining or humming noise from the sump: A blocked element creates cavitation in the pump, producing audible metallic sounds.
• Intermittent gear slipping under load: Insufficient hydraulic pressure due to a saturated filter results in clutch pack slippage during acceleration.

Technical Specifications

Compatibility

This filter is specifically designed for the ZF WG 180 and WG 200 transmission families. It is a direct replacement for units in the WG 181 Series and WG 200 Series, including models such as WG 180, WG 181, WG 200, and WG 201. The part also interfaces with the 0730365067: TYPE PLATE for correct identification during service, and the 0631311009: GROOVED STUD which secures the filter assembly to the transmission housing. Always verify your transmission serial number against the type plate before ordering.

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