ZF 4660.306.175 NOZZLE for WG200/WG92/WG98 | OEM Genuine Part

Overview

The ZF 4660.306.175 NOZZLE is a precision-engineered fluid metering component designed for the hydraulic control circuits within ZF’s WG200, WG92, and WG98 series transmissions. This OEM genuine part, identified by SKU 4660.306.175, regulates oil flow to critical clutch packs and valve bodies, ensuring consistent shift quality and thermal management. Installed directly into the TRANSMISSION HOUSING, this nozzle works in concert with the PERIPHERALS assembly to maintain precise lubrication paths. Its failure directly compromises hydraulic pressure stability, leading to degraded performance in heavy-duty industrial applications.

Symptoms of Failure

• Erratic or delayed gear engagement – A worn nozzle disrupts oil flow to the RANGE SELECTOR, causing hesitation when shifting between forward and reverse.
• Internal oil leaks and pressure loss – Cracks or debris in the nozzle orifice allow fluid to bypass, resulting in low line pressure and potential clutch slip under load.
• Overheating transmission fluid – Restricted flow from a clogged nozzle reduces cooling circulation, accelerating thermal degradation of seals and clutches.
• Whining or high-pitched noise from the valve body – Cavitation caused by a failing nozzle produces audible harmonics during operation, indicating turbulent fluid flow.

Technical Specifications

Compatibility

This nozzle is engineered for ZF WG-series transmissions, specifically the WG200, WG92, and WG98 models. It is also compatible with the WG180 series when used in conjunction with the HOUSING adapter. The part fits both standard and high-capacity sump configurations. For installations requiring a SUCTION TUBE upgrade, verify the nozzle orientation to avoid flow restriction. Always pair with a new O-RING and CAP SCREW to ensure leak-free operation.

Related Components