ZF 4657.055.120 5 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.055.120 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the gear cluster, clutch packs, and hydraulic control elements into a single, ready-to-install package. As the core of the WG 210 series, it manages torque distribution across five forward speeds, enabling smooth power shifts under load. The SKU 4657.055.120 replaces the need for individual component sourcing, ensuring precise OEM fitment. When installing this unit, the 4657101082: TRANSMISSION HOUSING provides the structural backbone, while the 4657201166: HOUS.FRONT SECT seals the forward clutch area. For rearward support, the 4657201170: HOUSING REAR PART and 4657298102: HOUSING REAR SECTION complete the enclosure, protecting internal gears from contamination.

Symptoms of Failure

• Delayed engagement or gear slipping: Worn clutch discs within the assembly cause hesitation when shifting from neutral to forward or reverse, especially under heavy load.
• Hydraulic oil leaks at the bell housing: Degraded seals on the input shaft allow transmission fluid to weep past the 4657101082: TRANSMISSION HOUSING, leaving puddles after operation.
• Erratic shift quality or harsh engagement: Internal valve body wear or piston seal failure leads to pressure spikes, making gear changes feel abrupt or jerky.
• Unusual whining or grinding noises: Bearing fatigue or gear tooth damage inside the 5 WG 210 produces a metallic sound that intensifies with engine RPM.

Technical Specifications

Compatibility

This complete assembly is engineered for the ZF WG 210 series, but its core architecture also supports select models in the WG 180 and WG 200 families when paired with the correct housing sections. Specifically, it fits WG 180-5, WG 200-5, and WG 210-5 transmissions used in wheel loaders, telehandlers, and industrial tractors from 2010 onward. The unit requires the 4657201166: HOUS.FRONT SECT for front clutch retention and the 4657201170: HOUSING REAR PART for output shaft support. For vehicles originally equipped with a WG 180 or WG 200, verify the rear housing interface; the 4657298102: HOUSING REAR SECTION may be needed to adapt the bolt pattern. Always cross-reference the vehicle’s transmission serial number with ZF documentation before ordering.

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