ZF 4166.035.187 CONVERTER Torque Converter Assembly | Complete Unit

Overview

The ZF 4166.035.187 CONVERTER Torque Converter Assembly is a complete, ready-to-install unit engineered for the WG 200 Series transmission family. This critical component sits between the engine flywheel and the transmission input shaft, functioning as a fluid coupling that multiplies engine torque while dampening driveline vibrations. The SKU 4166.035.187 replaces worn or failed converters to restore full power transfer and smooth engagement in heavy-duty industrial applications.

Symptoms of Failure

• Torque converter shudder or vibration during low-speed acceleration, often felt as a rhythmic shaking through the chassis.
• Transmission overheating caused by internal stator clutch failure, leading to reduced fluid circulation and elevated sump temperatures.
• Delayed or harsh engagement when shifting from Park to Drive or Reverse, indicating worn turbine splines or damaged lock-up clutch plates.
• Fluid contamination with metallic debris visible on the dipstick or during drain intervals, signaling internal bearing or impeller wear.

Technical Specifications

Compatibility

This torque converter assembly is primarily designed for ZF WG 200 Series transmissions, including models WG180, WG200, and WG210. It also fits select WG 150 variants with matching bellhousing patterns. Always verify the pilot bore diameter and flexplate bolt pattern before installation. For a complete rebuild, pair this unit with a new TRANSMISSION HOUSING (4644101249) or TRANSMISSION HOUSING (4644301402) to ensure proper alignment. Additionally, replace the O-RING (0634306323) at the converter hub seal surface and install a new COVER PLATE (4644301298) to prevent debris ingress during assembly.

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