ZF 4661.221.009 SUCTION TUBE for WG94 | OEM Genuine Part

Overview

The ZF 4661.221.009 Suction Tube is a critical hydraulic component engineered specifically for the WG 94 Series transmission family. This OEM genuine part, identified by SKU 4661.221.009, serves as the primary conduit for drawing transmission fluid from the sump into the hydraulic pump. Positioned within the lower valve body assembly, it ensures a consistent, debris-free oil supply to maintain clutch pack engagement and torque converter charging. Without this tube, the transmission cannot establish the necessary hydraulic pressure for operation. It works in conjunction with the 4661101042: TRANSMISSION HOUSING and the 4661301108: HOUSING II to create a sealed oil gallery.

Symptoms of Failure

When the ZF 4661.221.009 Suction Tube deteriorates, operators often report intermittent gear slipping under load, particularly during uphill climbs or heavy hauling. A cracked or warped tube allows air ingestion, leading to aerated transmission fluid and delayed engagement. You may also notice low hydraulic pressure warnings on the dashboard or visible oil puddling near the bell housing due to a compromised seal at the pump inlet. Ignoring these signs can accelerate wear on the 0631306174: CYLINDRICAL PIN that aligns the tube assembly.

Technical Specifications

Compatibility

This suction tube is primarily designed for the ZF WG 94 Series, but it also fits select models in the WG180 and WG200 families when used with the correct 0769123894: TYPE PLATE for identification. It is compatible with WG94, WG94-2, and WG94-3 variants found in off-highway trucks, wheel loaders, and heavy-duty agricultural tractors. Always verify the housing bore condition before installation.

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