ZF 4166.035.155 CONVERTER Torque Converter Assembly | Complete Unit

Overview

The ZF 4166.035.155 CONVERTER Torque Converter Assembly is a critical hydraulic coupling unit designed for the WG 200 Series transmission family. This complete assembly transfers engine torque to the transmission input shaft while multiplying rotational force during low-speed operation. Positioned between the engine flywheel and the transmission pump, the SKU 4166.035.155 ensures smooth power delivery and dampens driveline vibrations. As a direct replacement unit, it integrates seamlessly with the 4644105475 DISCONNECTION mechanism and the 4642303097 OUTPUT FLANGE to maintain proper drivetrain alignment.

Symptoms of Failure

• Torque converter shudder or vibration during acceleration, often felt as a rhythmic shaking through the chassis when the converter lockup clutch begins to slip.
• Delayed or harsh engagement when shifting from Park to Drive or Reverse, indicating worn internal stator bearings or damaged turbine splines.
• Transmission fluid overheating combined with a burnt smell, caused by internal converter clutch slippage generating excessive friction heat.
• Whining or grinding noises from the bell housing area, typically from failed needle bearings within the converter hub assembly.

Technical Specifications

Compatibility

This torque converter assembly is engineered for ZF WG 200 Series transmissions, including the WG180, WG200, and WG210 variants commonly found in medium-duty trucks, buses, and off-highway equipment. It also fits select ZF 6HP and 8HP automatic transmissions that share the WG bell housing pattern. For proper installation, ensure the 4644101134 TRANSMISSION HOUSING is free of cracks and the 0636020211 HEXAGON SCREW set is torqued to factory specifications. Always verify the converter pilot diameter matches your flexplate before assembly.

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