ZF 4660.221.017 TUBE for WG98 | OEM Genuine Part

Overview

The ZF 4660.221.017 TUBE for WG98 is a precision-engineered hydraulic fluid conduit designed to maintain proper lubrication and cooling within the transmission assembly. This OEM genuine part sits between the main valve body and the upper clutch housing, directing pressurized oil to critical rotating components. The SKU 4660.221.017 is manufactured to ZF’s exacting tolerances, ensuring seamless fitment and consistent flow characteristics. When installed alongside the TRANSMISSION HOUSING and HOUSING II, this tube forms a sealed circuit that prevents pressure loss and thermal degradation.

Symptoms of Failure

• Hydraulic oil leaks at the tube-to-housing interface — Cracks or corrosion on the tube body cause visible drips under the transmission, often mistaken for seal failure.
• Delayed or harsh gear engagement — Reduced oil pressure from a compromised tube leads to sluggish clutch pack actuation, especially in lower gears.
• Overheating transmission fluid — A restricted or deformed tube disrupts oil flow to the cooler, causing temperature spikes during heavy load operation.
• Whining or cavitation noise — Air ingress through a damaged tube creates a high-pitched sound as the pump struggles to maintain prime.

Technical Specifications

Compatibility

This tube is specifically designed for the ZF WG 98 Series transmissions, including models WG180, WG200, and WG210. It also fits select WG98 variants used in medium-duty trucks and off-highway equipment. The part interfaces directly with the CYLINDRICAL PIN for alignment and the TYPE PLATE for identification. Always verify your transmission serial number against the WG98 family before ordering.

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