ZF 4657.056.038 6 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.056.038 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty off-highway applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system into a single, pre-tested assembly. The SKU 4657.056.038 designates a factory-spec unit that sits at the core of the driveline, directly coupling to the engine bellhousing and output driveline. For a full rebuild, this assembly must be mated to a robust TRANSMISSION HOUSING to ensure structural integrity under high torque loads.

Symptoms of Failure

• Erratic gear engagement and slipping under load: When the internal clutch packs or valve body wear, the transmission may hesitate or slip when shifting from forward to reverse, especially on inclines.
• Hydraulic oil leaks around the bellhousing: Cracks or seal failures in the HOUS.FRONT SECT can cause visible drips of ATF, leading to low pressure and eventual gear train damage.
• Delayed or harsh shifting: A failing torque converter or worn spool valves produce a noticeable lag between throttle input and gear change, often accompanied by a metallic clunk.
• Overheating and burnt fluid smell: Internal debris from a failing HOUSING REAR PART can clog the oil cooler circuit, causing the transmission to run hot and degrade the fluid.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 Series powershift transmissions. It is directly compatible with the following ZF models: WG 180, WG 200, WG 210, and WG 250 series used in wheel loaders, forklifts, and telehandlers. The assembly also fits select variants of the ZF 4WG-200 and 6WG-210 platforms. Always verify the bellhousing pattern and output flange configuration against your existing unit before installation. A CYLINDRICAL PIN is required to align the housing sections during reassembly.

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