ZF 4642.138.006 FILTER for WG 150 | OEM Genuine Part

Overview

The ZF 4642.138.006 FILTER is a critical hydraulic filtration component engineered specifically for the WG 150 series transmission. Positioned within the oil sump or main pressure line, this genuine OEM part captures particulate contaminants and wear debris before they can circulate through the valve body and clutch packs. The SKU 4642.138.006 designates a direct replacement unit that meets ZF’s original flow and micron rating specifications. This filter sits in close proximity to the TRANSMISSION HOUSING (4642101109) and the TRANSMISSION HOUSING (4642301205), ensuring that only clean oil reaches the precision-ground gears and bearings.

Symptoms of Failure

• Erratic shifting or gear slippage — A clogged filter restricts oil flow, causing delayed engagement or slipping under load, especially in WG 150 units operating in heavy-duty cycles.
• Overheating transmission fluid — Restricted filtration forces the pump to work harder, raising sump temperatures beyond normal operating ranges.
• Whining or groaning noises from the pump — Starvation of hydraulic fluid due to a blocked filter element produces audible cavitation sounds.
• Visible metallic particles in the oil pan — When the filter bypass valve opens, debris bypasses the element and accumulates in the sump, indicating imminent internal wear.

Technical Specifications

Compatibility

This filter is primarily designed for the ZF WG 150 series, but it also fits select variants of the WG 180 and WG 200 transmissions due to shared hydraulic circuit architecture. Always verify the part number against your transmission’s serial plate—the TYPE PLATE (0730365125) provides the exact model designation. The filter mounts securely using a GROOVED STUD (0631311009) to prevent vibration loosening.

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