ZF 4657.056.303 6 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.056.303 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This SKU 4657.056.303 serves as the core power transfer module within the WG 210 series, integrating the planetary gear sets, clutch packs, and hydraulic control valves into a single, ready-to-install assembly. It sits between the engine flywheel and the final drive, converting torque into precise, shift-on-the-go performance for loaders, graders, and industrial tractors. When replacing this assembly, it is critical to inspect the supporting TRANSMISSION HOUSING for cracks or wear, as the unit seals directly against it.

Symptoms of Failure

When the ZF 4657.056.303 assembly begins to fail, operators typically notice these specific issues:

• Delayed or harsh engagement: The transmission hesitates before moving forward or reverse, often accompanied by a loud clunk. This indicates worn clutch discs or degraded seals inside the unit.
• Oil leaks at the bell housing: Fluid seeping from the front of the assembly suggests a failed input shaft seal or a compromised SURFACE SEALING COMPOUND between the housing sections.
• Gear slipping under load: The engine revs up, but vehicle speed does not increase proportionally, especially when climbing grades or pushing heavy loads.
• Unusual whining or grinding noises: Metallic sounds from the transmission center indicate bearing failure or gear tooth damage within the assembly.

Technical Specifications

Compatibility

This complete assembly is specifically engineered for the ZF WG 210 series transmissions. It is directly compatible with models including the WG180, WG200, and WG210 variants used in construction and agricultural equipment. The unit also fits select applications where the HOUS.FRONT SECT and HOUSING REAR PART are original equipment. Always verify your transmission model tag before installation.

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