ZF 4661.004.019 4 WG 94 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4661.004.019 4 WG 94 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the core gear train, clutch packs, and hydraulic control components into a single ready-to-install package. As the central power transfer module, it sits between the engine and the driveline, managing torque distribution across four forward and reverse speeds. The SKU 4661.004.019 denotes a fully assembled WG 94 series unit, ensuring precise alignment of internal components such as the TRANSMISSION HOUSING and HOUSING II for optimal oil flow and gear engagement.

Symptoms of Failure

• Erratic shifting or gear slippage under load: Worn clutch discs or valve body wear inside the assembly cause delayed engagement, especially when transitioning from forward to reverse.
• External oil leaks near the housing seam: Degraded gaskets or cracks in the TRANSMISSION HOUSING allow hydraulic fluid to escape, leading to low pressure and overheating.
• Unusual grinding or whining noises during operation: Bearing fatigue or misaligned shafts within the unit produce metallic sounds, often accompanied by vibration through the chassis.
• Intermittent loss of drive in specific gears: A failing CYLINDRICAL PIN or damaged TUBE can disrupt oil supply to clutch packs, causing partial power loss.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 94 series of powershift transmissions. It is a direct replacement for models including the WG180, WG200, and WG210, commonly found in wheel loaders, telehandlers, and industrial tractors. The assembly also fits select variants of the WG150 and WG240 when paired with the correct adapter kit. Always verify the serial number against your existing unit before installation.

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