ZF 4657.055.118 5 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.055.118 5 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-built gearbox core designed for heavy-duty off-highway machinery. This complete unit serves as the central power transfer module within the WG 210 series, converting engine torque into controlled hydraulic-mechanical drive for wheel loaders, graders, and industrial tractors. The SKU 4657.055.118 represents a remanufactured or new replacement assembly that includes all internal clutches, shafts, and valve bodies. In the transmission layout, this unit sits between the torque converter and the final drive, with the TRANSMISSION HOUSING forming its structural backbone. For a complete rebuild, the HOUS.FRONT SECT and HOUSING REAR PART must be inspected alongside this assembly to ensure proper alignment and sealing.

Symptoms of Failure

• Erratic gear engagement under load: When the 5 WG 210 assembly wears, operators experience delayed or harsh shifting, particularly when transitioning between forward and reverse. This often manifests as a “clunk” or momentary loss of drive power.
• Hydraulic oil contamination with metallic debris: Worn clutch packs or bearing surfaces inside the assembly shed fine metal particles into the transmission fluid, visible as glitter in the oil sample or on the magnetic drain plug.
• External oil seepage from housing joints: Cracks or gasket failure in the HOUSING REAR SECTION or front cover allow ATF to leak, leaving visible drips under the machine after shutdown.
• Torque converter stall speed deviation: A failing powershift unit causes the engine RPM to rise higher than normal before the machine moves, indicating internal clutch slippage or valve body malfunction.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models including WG180, WG200, and WG210 used in construction and agricultural equipment. The assembly also fits select variants of the WG 150 and WG 250 series when paired with the correct adapter plates. Always verify the housing casting numbers—specifically the HOUS.FRONT SECT and HOUSING REAR PART—to confirm fitment for your specific machine model (e.g., Volvo L120, Caterpillar 950, or ZL50 loaders).

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