ZF 4657.056.138 6 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.056.138 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit engineered for heavy-duty off-highway machinery. This assembly serves as the central power transfer module within the WG 210 series, integrating the torque converter, planetary gear sets, and hydraulic clutch packs into a single, ready-to-install package. As a direct replacement for the SKU 4657.056.138, this unit eliminates the need for piecemeal rebuilding, ensuring optimal gear engagement and load management in wheel loaders, graders, and industrial tractors. The assembly interfaces directly with the 4657101082: TRANSMISSION HOUSING to form the structural backbone of the drivetrain.

Symptoms of Failure

• Delayed or harsh gear engagement: When the assembly wears, hydraulic pressure drops, causing a noticeable lag or jarring shift when moving from neutral to forward or reverse.
• Chronic transmission fluid leaks: Degraded seals within the assembly allow ATF to weep from the bell housing or output flange, often leaving puddles under the machine after shutdown.
• Torque converter shudder under load: A vibrating or chattering sensation during low-speed, high-torque operations indicates internal clutch pack wear or stator failure.
• Intermittent loss of drive in specific ranges: The transmission may suddenly fail to engage 3rd or 4th gear, pointing to a fractured planetary carrier or worn piston seals inside the assembly.

Technical Specifications

Compatibility

This complete unit is specifically designed for the ZF WG 210 series. It is also a direct fit for the WG 180 and WG 200 series when used with the appropriate adapter plate. The assembly is compatible with the 4657201166: HOUS.FRONT SECT and the 4657201170: HOUSING REAR PART to create a sealed drivetrain envelope. For extended rebuilds, the 4657298102: HOUSING REAR SECTION provides additional structural support for the output shaft.

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