ZF 4616.301.221 TUBE for WG65 | OEM Genuine Part

Overview

The ZF 4616.301.221 TUBE is a precision-engineered fluid conduit specifically designed for the WG 65 Series transmission. This OEM genuine part serves as a critical channel for directing hydraulic oil within the valve body and clutch assembly, ensuring consistent pressure delivery during gear shifts. As an original ZF component, the SKU 4616.301.221 guarantees exact fitment and material integrity, preventing cross-threading or deformation under high thermal loads. This tube is often replaced during a full transmission overhaul alongside the TRANSMISSION HOUSING to maintain internal fluid routing integrity.

Symptoms of Failure

• External hydraulic oil seepage: A worn or cracked 4616.301.221 tube will allow ATF to escape, leaving visible drips under the bell housing or along the transmission pan rail.
• Erratic shift timing or gear hunting: When the tube loses its seal, pressure drops cause delayed engagement between forward and reverse gears, particularly under load.
• Audible whining or cavitation noise: A restricted or collapsed tube restricts fluid flow, causing the pump to cavitate, which produces a high-pitched whine during acceleration.
• Overheating transmission fluid: Insufficient oil volume due to a leak from this tube leads to elevated sump temperatures, triggering warning lights on heavy equipment.

Technical Specifications

Compatibility

This tube is engineered for the ZF WG 65 Series transmission family. Based on its hydraulic routing design, it is also compatible with the following ZF models that share the same valve body architecture: WG180, WG200, WG210, and WG250. Always verify the tube orientation against your transmission’s internal diagram, as the 4616.301.221 is position-specific within the clutch feed circuit. For complete assembly, secure the tube using the HEXAGON SCREW, the HEXAGON SCREW, and the HEXAGON SCREW to ensure proper clamping force without distortion.

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