ZF 4661.221.005 SUCTION TUBE for WG94 | OEM Genuine Part

Overview

The ZF 4661.221.005 SUCTION TUBE is a critical hydraulic component engineered for the WG 94 Series transmission. This OEM genuine part serves as the primary conduit for drawing transmission fluid from the sump to the pump, ensuring consistent lubrication and cooling of internal assemblies. Positioned within the lower valve body area, the suction tube maintains oil pressure integrity during high-torque operations. The SKU 4661.221.005 is precision-machined to factory tolerances, directly interfacing with the 4661101013: TRANSMISSION HOUSING to prevent cavitation and flow restriction. Without this tube, the gear train would experience rapid thermal degradation.

Symptoms of Failure

• Low hydraulic pressure and gear slipping — A cracked or clogged suction tube starves the pump, causing delayed engagement and erratic shifting under load.
• Audible whining or cavitation noise — Air ingestion through a worn tube creates a high-pitched sound, especially during cold starts or acceleration.
• Transmission overheating — Insufficient fluid flow due to a collapsed or blocked suction tube leads to elevated sump temperatures and potential clutch damage.
• Visible fluid leaks near the pump inlet — Cracks in the tube body or at the O-ring seat cause drips that worsen with vibration, often mistaken for a pan gasket failure.

Technical Specifications

Compatibility

This suction tube is specifically designed for the ZF WG 94 Series transmission family, including models such as WG180, WG200, and WG240. It is also compatible with certain WG92 variants that share the same pump housing geometry. The part directly mounts to the 4661301022: HOUSING and is secured using a 0631306174: CYLINDRICAL PIN for alignment. Always verify the 0769123894: TYPE PLATE on your unit to confirm model revision before installation.

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