ZF 4657.056.079 6 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.056.079 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-matched gearbox core designed for heavy-duty off-highway machinery. This complete assembly serves as the central power transfer module within the WG 210 series, managing torque distribution across six forward speeds. The SKU 4657.056.079 represents a drop-in replacement unit that eliminates the need for partial rebuilds, ensuring structural integrity through its precision-machined casing. It interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form the primary load-bearing structure of the drivetrain.

Symptoms of Failure

• Erratic gear engagement under load: When the complete unit wears, operators report delayed or harsh shifting during uphill travel, often accompanied by a grinding noise from the clutch pack area.
• Hydraulic fluid contamination: Internal seal degradation allows metal particles to circulate, causing the oil to appear milky or dark. This symptom frequently requires replacement of the HOUSING REAR PART due to scoring.
• Torque converter stall: A failing assembly prevents proper lock-up, resulting in engine RPM spikes without corresponding vehicle movement. This is often misdiagnosed as a pump issue.
• External oil seepage at mating flanges: Cracks in the main casing or worn CYLINDRICAL PIN bores lead to visible drips around the bell housing interface.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 series, but its mounting pattern and spline count also suit earlier WG 180 and WG 200 models with minor adapter modifications. It is a direct fit for 6 WG 210 configurations used in loaders, graders, and compactors from 2010 onward. Always verify the bell housing bolt pattern against your existing TRANSMISSION HOUSING before installation.

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