ZF 4616.000.257 4 WG 65 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4616.000.257 4 WG 65 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the clutch pack, planetary gear sets, and hydraulic control components into a single, ready-to-install package. As a core element of the WG 65 series, it manages torque distribution across four forward and reverse speeds. The SKU 4616.000.257 replaces worn or failed assemblies, restoring full power flow in wheel loaders, dozers, and graders. This unit mounts directly to the 4616101140: TRANSMISSION HOUSING, which provides structural support and oil routing channels.

Symptoms of Failure

• Erratic gear engagement or slipping under load – Worn clutch discs or piston seals inside the 4616.000.257 cause delayed shifts or loss of torque during heavy digging.
• Low hydraulic pressure warnings – Internal leakage past valve bodies or seal rings reduces system pressure, triggering dash alarms and sluggish operation.
• Metallic debris in transmission oil – Bearing or gear spalling from fatigue contaminates the fluid, often visible on the dipstick or filter magnet.
• Oil leaks at housing joints – Cracks or gasket failures in the assembly allow fluid to escape, typically pooling under the bell housing area.

Technical Specifications

Compatibility

This 4 WG 65 assembly is engineered for ZF’s WG series powershift transmissions, specifically the WG180, WG200, and WG250 models. It is also backward-compatible with select WG160 units when paired with the correct 4616301304: HOUSING adapter. For WG300 variants, verify the clutch count matches your application. The assembly integrates with the 4616301309: HOUSING on later production runs. Always confirm the bell housing pattern before installation.

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