ZF 4166.039.052 CONVERTER Torque Converter Assembly | Complete Unit

Overview

The ZF 4166.039.052 CONVERTER Torque Converter Assembly is a critical hydraulic component that transfers and multiplies engine torque to the transmission input shaft within the WG 65 Series. This complete unit replaces the factory torque converter, ensuring smooth power delivery and preventing driveline shock. The SKU 4166.039.052 is designed to sit directly between the engine flywheel and the transmission pump, converting rotational energy into fluid flow to drive the planetary gear sets. When paired with a robust 4616105402: OUTPUT shaft, this assembly maintains consistent hydraulic pressure for reliable shifting under heavy loads.

Symptoms of Failure

• Shuddering or vibration during acceleration: A worn torque converter fails to lock up properly, causing noticeable shudder at highway speeds or under load.
• Delayed or harsh gear engagement: When the converter stator or turbine wears, you may experience a lag when shifting from Park to Drive or Reverse.
• Transmission fluid overheating: Internal slippage generates excessive heat, often indicated by a burnt smell or dashboard warning lights.
• Torque converter clutch (TCC) slippage: The unit fails to maintain lockup, leading to increased RPM without corresponding vehicle speed.

Technical Specifications

Compatibility

This torque converter assembly is engineered for the ZF WG 65 Series, including models such as the WG180, WG200, and WG250. It is also compatible with certain WG 65 variants used in off-highway trucks, wheel loaders, and industrial machinery. Always verify the spline count and pilot diameter against your specific transmission housing. For a complete rebuild, consider replacing the 4005303005: OUTPUT FLANGE and inspecting the 4616101119: TRANSMISSION HOUSING for cracks or wear. Secure the assembly with a new 0636011038: HEXAGON SCREW to ensure proper torque retention.

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