ZF 4661.134.013 CONVERTER Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4661.134.013 CONVERTER Powershift Transmission Assembly is a complete, ready-to-install torque converter unit engineered for the demanding WG 94 Series of industrial transmissions. This assembly serves as the critical hydraulic coupling between the engine and the gear train, modulating power delivery to prevent driveline shock and enable smooth directional shifts under load. The SKU 4661.134.013 integrates the impeller, turbine, and stator within a sealed housing, ensuring precise oil flow for clutch engagement and cooling. As a core component of the WG 94 family, it directly interfaces with the 4661101042: TRANSMISSION HOUSING to form the primary structural shell, while the 4661301108: HOUSING II provides the rear support for the converter assembly. This unit is a direct replacement for worn or failed converters, restoring full torque multiplication and hydraulic control in heavy-duty construction and material handling equipment.

Symptoms of Failure

• Torque converter shudder or vibration during acceleration: Worn internal stator bearings or damaged turbine blades cause uneven fluid flow, leading to noticeable shaking when the transmission is under load.
• Delayed engagement or gear slipping: A failing converter cannot build sufficient hydraulic pressure, resulting in a lag between shifting and actual gear engagement, often accompanied by high RPM with low vehicle speed.
• Contaminated transmission fluid with metallic debris: Internal wear of the converter clutch or thrust washers sheds fine metal particles into the oil, visible during fluid changes and indicating imminent converter failure.
• Overheating transmission under normal operation: A locked-up or slipping stator reduces oil circulation, causing the transmission to run hotter than normal and triggering warning lights or limp mode.

Technical Specifications

Compatibility

This converter assembly is specifically engineered for the ZF WG 94 Series of powershift transmissions. It is a direct fit for the WG180 and WG200 models commonly found in wheel loaders, forklifts, and telehandlers from manufacturers such as Caterpillar, Volvo, and JCB. The unit is also compatible with select WG 92 Series variants when used with the correct 4661101042: TRANSMISSION HOUSING adapter. Always verify the spline count and pilot diameter against your existing converter before installation. For applications requiring a replacement of the rear support, the 4661301108: HOUSING II must be inspected for wear simultaneously.

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