ZF 4657.056.022 6 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.056.022 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single ready-to-install package. As the core power delivery module for the WG 210 series, it replaces worn or failed transmissions in wheel loaders, dump trucks, and material handlers. The SKU 4657.056.022 is a direct OEM equivalent, ensuring seamless fitment with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a complete driveline assembly.

Symptoms of Failure

• Erratic gear engagement or slipping under load – Worn clutch discs or piston seals inside the assembly cause delayed shifts or loss of torque during operation.
• Internal oil leaks and low hydraulic pressure – Cracks in the HOUSING REAR PART or damaged sealing surfaces lead to fluid loss, overheating, and eventual transmission failure.
• Unusual grinding or whining noises – Failed bearings or damaged planetary gears within the assembly produce metallic sounds, especially during direction changes.
• Inability to hold park or neutral – A failing spool valve or broken CYLINDRICAL PIN prevents proper detent engagement, causing unintended vehicle movement.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 series, but it also fits earlier WG 180 and WG 200 models with minor adapter modifications. It is commonly used in ZF 6WG210, 6WG200, and 6WG180 transmissions found in Volvo L120, Caterpillar 950, and Komatsu WA380 wheel loaders. Always verify the bellhousing pattern and torque converter match before installation. For partial rebuilds, the TRANSMISSION HOUSING and HOUS.FRONT SECT are critical mating components.

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