ZF 4642.221.151 TUBE for WG150 | OEM Genuine Part

Overview

The ZF 4642.221.151 TUBE is a precision-engineered hydraulic fluid conduit designed exclusively for the WG 150 Series transmission. This OEM genuine part channels pressurized oil to critical clutch packs and valve bodies, ensuring consistent shift quality and thermal regulation. As a direct replacement for the factory-installed component, the SKU 4642.221.151 eliminates guesswork during rebuilds. It mounts internally within the main casing, connecting the pump output to the lubrication circuit. For full access during installation, the TRANSMISSION HOUSING 4642101109 must be removed, and the TRANSMISSION HOUSING 4642301205 provides the mating surface for secure alignment.

Symptoms of Failure

• External oil seepage at tube ends: Cracks or O-ring degradation cause fluid to weep from the joint, leaving visible drips under the transmission.
• Erratic gear engagement under load: A compromised tube reduces line pressure, leading to delayed or harsh shifts during acceleration.
• Overheating transmission fluid: Restricted flow from a collapsed tube prevents proper cooling, triggering thermal warnings on the dash.
• Audible whining from the pump: Air ingestion through a fractured tube creates cavitation noise, especially at idle.

Technical Specifications

Compatibility

This tube is engineered for the ZF WG 150 Series, including the WG150, WG151, and WG152 variants. It also fits select WG180 and WG200 models produced between 2005 and 2018 when the transmission uses the same hydraulic routing. Always verify the part number stamped on the original tube before ordering. The TYPE PLATE 0730365125 on the housing provides the exact model code, while the GROOVED STUD 0631311009 secures the tube bracket during reassembly.

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