ZF 4657.054.026 4 WG 210 Powershift Transmission Assembly | Complete Unit

Overview

This ZF 4657.054.026 4 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. As the core power transfer module in the WG 210 series, this assembly integrates the planetary gear sets, clutch packs, and hydraulic control system into a single ready-to-install package. The SKU 4657.054.026 replaces worn or failed complete transmissions, restoring full torque capacity and shift quality in loaders, graders, and industrial vehicles. This unit sits between the engine bellhousing and the final drive, managing all gear ratio changes under load without power interruption.

Symptoms of Failure

• Delayed or harsh engagement — When the complete unit wears internally, operators experience a noticeable lag between shifting and actual gear engagement, often accompanied by a jarring clunk as clutches grab unevenly.
• Loss of power under load — A failing assembly allows internal slippage, causing the machine to lose tractive effort when pushing heavy material, particularly in second or third gear ranges.
• Contaminated transmission fluid with metallic debris — Worn bearings and clutch plates shed particles into the oil, visible as glitter or sludge on the dipstick, indicating internal component degradation within the 4657.054.026 unit.
• Intermittent neutral or gear drop-out — As hydraulic seals degrade, the transmission may suddenly shift to neutral during operation, creating a dangerous loss of drive without warning.

Technical Specifications

Compatibility

This complete transmission assembly is engineered for the ZF WG 210 series. It is directly compatible with models including the WG 180, WG 200, and WG 210 power shift transmissions found in articulated dump trucks, wheel loaders, and telescopic handlers. The 4657.054.026 unit also fits select variants of the 4 WG 200 and 4 WG 210 four-speed configurations. Always verify your transmission serial number against the OEM fitment guide before installation.

During installation, this assembly must be paired with the 4657101045: TRANSMISSION HOUSING to provide the structural backbone. The front section is sealed by the 4657201027: HOUS.FRONT SECT, while the rear is enclosed by the 4657201020: HOUSING REAR PART. Precise alignment is ensured using the 0631306792: CYLINDRICAL PIN during assembly.

Related Components

Frequently Asked Questions

Q: Is the 4657.054.026 a direct bolt-in replacement for my existing WG 210 transmission?
A: Yes, this complete assembly is designed as a one-to-one replacement for the 4 WG 210 series. Ensure your bellhousing and output flange match the SAE 3 pattern before ordering.

Q: What is the typical service life of this complete unit under normal operating conditions?
A: With proper maintenance and clean hydraulic oil, the 4657.054.026 assembly typically delivers 8,000 to 12,000 hours of service in heavy equipment applications before requiring overhaul.

Q: Do I need to replace the housing sections when installing this assembly?
A: Not necessarily. However, we strongly recommend inspecting the TRANSMISSION HOUSING and both front and rear sections for cracks or wear, as reusing damaged housings will compromise the new unit’s alignment.