ZF 4657.055.138 5 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.055.138 5 WG 210 Powershift Transmission Assembly is a complete, fully assembled unit designed for heavy-duty industrial and agricultural machinery. This core assembly integrates the main gear train, clutch packs, and hydraulic control elements within a robust housing structure. As a complete unit, the SKU 4657.055.138 replaces the entire transmission core, eliminating the need for piecemeal rebuilding. It sits as the central drivetrain component, transferring engine power to the final drives. For proper installation, this assembly mates directly with the TRANSMISSION HOUSING to ensure structural integrity.

Symptoms of Failure

When the ZF 4657.055.138 assembly begins to fail, operators typically notice these specific symptoms:

• Erratic gear engagement or slipping under load: Worn clutch packs or valve body issues within the assembly cause delayed or harsh shifting, especially in higher gears.
• Internal hydraulic pressure loss: Cracks in the housing or seal failures lead to low line pressure, resulting in sluggish operation and overheating.
• Contaminated transmission fluid with metallic debris: Bearing or gear wear inside the unit produces metal shavings, visible during oil changes.
• Oil leaks at the front or rear mating surfaces: Failure of the gasket between this assembly and the HOUS.FRONT SECT or HOUSING REAR PART causes external fluid loss.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 210 Series. It is directly compatible with the following transmission models and their variants:

• ZF 5 WG 210 (primary application)
• ZF WG 180 (with adapter modifications to the HOUSING REAR SECTION)
• ZF WG 200 (structural match, verify bell housing pattern)
• ZF 4 WG 210 (same core dimensions, different clutch count)

Always confirm the rear housing configuration; the HOUSING REAR SECTION must match your vehicle’s PTO mounting pattern.

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