ZF 4657.056.057 6 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.056.057 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement for heavy-duty powershift applications. This complete assembly serves as the central power transfer module within the WG 210 series, managing clutch engagement and gear ratio selection under high torque loads. The SKU 4657.056.057 denotes a factory-balanced unit that includes the main shaft assembly, clutch packs, and valve body components. When installing this unit, it is critical to verify the condition of the TRANSMISSION HOUSING and the HOUS.FRONT SECT to ensure proper alignment and sealing of the complete assembly.

Symptoms of Failure

• Delayed or harsh shifting under load: A worn complete unit often causes erratic clutch engagement, leading to jarring gear changes during operation.
• Persistent oil leaks at the main case seam: Degraded seals within the assembly allow transmission fluid to escape, typically pooling near the bell housing or front section.
• Loss of power transfer in higher gears: Internal wear on the planetary gear sets results in slipping or complete loss of drive in 4th, 5th, or 6th gear.
• Unusual metallic grinding noises: Bearing fatigue inside the unit produces a distinct whine or grind that intensifies with engine RPM.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 series, but it also directly replaces assemblies in the WG 180 and WG 200 transmissions when used with the appropriate adapter kit. It is commonly found in agricultural tractors, wheel loaders, and industrial forklifts from manufacturers such as Case IH, New Holland, and JCB. For a secure fit, always pair this unit with a new HOUSING REAR PART and the CYLINDRICAL PIN to maintain precise dowel alignment during reassembly.

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