ZF 4646.006.055 6 WG 250 ERGOPOWER Transmission Assembly | Complete Unit

Overview

The ZF 4646.006.055 6 WG 250 ERGOPOWER Transmission Assembly is a complete, factory-sealed unit designed for heavy-duty commercial vehicles and industrial machinery. This assembly integrates the planetary gear set, clutch packs, and hydraulic control system into a single drop-in replacement. The SKU 4646.006.055 corresponds to the full assembly, which sits at the core of the ZF WG 250 series, managing torque distribution across six forward gears. For optimal sealing and structural integrity, this unit is paired with a TRANSMISSION HOUSING and a HOUSING that protect internal components from debris and thermal stress.

Symptoms of Failure

When the ZF 4646.006.055 assembly begins to wear, operators may notice these specific failure indicators:

• Delayed gear engagement or slipping – Often caused by worn clutch discs or degraded hydraulic seals within the assembly, leading to hesitation when shifting from neutral to drive.
• Oil leaks near the bell housing – A common sign of a compromised COVER gasket or loose HEXAGON SCREW fasteners, resulting in fluid loss and reduced lubrication.
• Erratic shifting under load – Internal wear in the valve body or planetary gears can cause harsh or unpredictable shifts, especially when climbing grades or towing heavy loads.
• Unusual whining or grinding noises – Metal-on-metal contact from bearing failure or gear tooth damage inside the assembly produces audible distress signals.

Technical Specifications

Compatibility

This assembly is engineered for the ZF WG 250 series, but its core architecture shares components with other ZF ERGOPOWER models. It is directly compatible with:

• ZF WG 180
• ZF WG 200
• ZF WG 250 (primary application)
• ZF WG 300 (with adapter modifications)

Always verify your transmission model and serial number before installation. The TRANSMISSION HOUSING and HOUSING are critical for proper alignment across these variants.

Related Components