ZF 4657.055.122 5 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.055.122 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty industrial and agricultural machinery. This assembly integrates the core gear train, clutch packs, and hydraulic control elements within a sealed housing, serving as the primary power transfer module in ZF’s WG 210 series. The SKU 4657.055.122 represents a fully assembled drop-in replacement, eliminating the need for piecemeal component sourcing. It sits at the heart of the driveline, converting engine torque into precisely modulated output speeds for loader, grader, and forklift applications.

Symptoms of Failure

• Erratic gear engagement or slipping under load: Worn clutch packs or degraded seals inside the assembly cause delayed shifts or complete loss of drive torque, especially during heavy lifting or incline operation.
• External oil leaks at housing seams: Cracks or gasket failures in the TRANSMISSION HOUSING or HOUS.FRONT SECT allow hydraulic fluid to escape, leading to low pressure and eventual transmission failure.
• Metallic grinding or whining noise: Bearing degradation or gear tooth damage within the assembly produces audible distress signals, often accompanied by vibration in the operator cab.
• Overheating and fluid discoloration: Internal friction from failing components generates excessive heat, turning transmission fluid dark and producing a burnt odor.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 series, but its core architecture shares mounting patterns and hydraulic interfaces with the WG 180 and WG 200 families. It is a direct fit for models such as the ZF 5 WG 210, 5 WG 200, and 5 WG 180 used in telehandlers, wheel loaders, and industrial tractors. When replacing the assembly, always inspect the HOUSING REAR PART and HOUSING REAR SECTION for wear, as these components seal the output shaft area.

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