ZF 4661.134.003 CONVERTER Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4661.134.003 CONVERTER Powershift Transmission Assembly is a complete, ready-to-install torque converter unit engineered for the WG 94 Series. This assembly serves as the critical hydraulic coupling between the engine and the gear train, modulating power delivery to prevent driveline shock during directional shifts. As a fully assembled unit, SKU 4661.134.003 replaces the entire converter assembly, including the stator, impeller, and turbine components. It integrates directly with the 4661101013: TRANSMISSION HOUSING and the 4661301022: HOUSING to form the sealed converter circuit. This unit is precision-balanced to eliminate vibration and ensure consistent lock-up performance under heavy loads.

Symptoms of Failure

When the ZF 4661.134.003 converter assembly begins to fail, operators often notice torque converter shudder during low-speed maneuvering, a common long-tail search query for WG Series transmissions. Another frequent symptom is transmission overheating combined with high stall speeds, indicating worn internal vanes or a failing stator clutch. You may also experience intermittent gear slipping under load, particularly when climbing grades, as the converter fails to maintain hydraulic pressure. Finally, dark, metallic-contaminated transmission fluid signals internal wear of the converter hub or thrust washer, requiring immediate replacement of this assembly.

Technical Specifications

Compatibility

This converter assembly is specifically designed for the ZF WG 94 Series powershift transmissions. It is directly compatible with the WG180 and WG200 models, which are commonly found in heavy-duty wheel loaders, graders, and industrial tractors. The unit also fits select WG150 variants that share the same bellhousing pattern and input shaft spline count. For precise fitment, always verify the pilot bore diameter and flexplate bolt pattern against your transmission’s serial number. When installing, ensure the 0631306174: CYLINDRICAL PIN is correctly aligned in the housing dowel hole, and affix the 0769123894: TYPE PLATE for future identification.

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