ZF 4166.335.264 STATOR for WG150/WG200 | OEM Genuine Part

Overview

The ZF 4166.335.264 STATOR is a precision-engineered hydraulic component designed for the torque converter assembly in ZF WG150 and WG200 series transmissions. This OEM genuine part redirects fluid flow to optimize torque multiplication, directly influencing shift quality and drivetrain efficiency. As a stationary element within the converter housing, the stator works in concert with the turbine and impeller to manage fluid dynamics under load. The SKU 4166.335.264 is a direct replacement for worn units, ensuring that the transmission maintains its original performance specifications. Without a properly functioning stator, the transmission cannot achieve the necessary hydraulic pressure for smooth gear engagement.

Symptoms of Failure

• Torque converter shudder or vibration during acceleration: A worn stator with damaged blades or a seized one-way clutch causes irregular fluid flow, leading to noticeable shuddering when the vehicle is under load.
• Delayed or harsh gear engagement: When the stator fails to redirect fluid efficiently, the transmission may exhibit a pronounced lag when shifting from Park to Drive or Reverse, followed by a jarring engagement.
• Overheating transmission fluid: A malfunctioning stator increases internal turbulence and heat generation, often triggering warning lights or causing fluid to darken and burn prematurely.
• Reduced fuel economy and sluggish performance: Loss of torque multiplication forces the engine to work harder, resulting in a measurable drop in miles per gallon and a general lack of power during highway merging.

Technical Specifications

Compatibility

This stator is engineered for the ZF WG150 and WG200 series transmissions, which are commonly found in medium-duty commercial vehicles, buses, and off-highway equipment. Specifically, it is a direct fit for models including the WG150, WG151, WG180, WG200, and WG210. The part is not compatible with older ZF 4HP or 5HP series units. Always verify the transmission model number stamped on the bell housing before ordering. For proper installation, ensure the stator’s one-way clutch rotates freely in one direction only.

During a full rebuild, this stator is typically installed alongside the TRANSMISSION HOUSING (4642101047) and the TRANSMISSION HOUSING (4642301207) to ensure correct alignment of the torque converter assembly. Additionally, the TYPE PLATE (0730365067) should be replaced to maintain accurate unit identification, while the GROOVED STUD (0631311009) secures the stator to the pump drive hub.

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