ZF 4644.026.092 6 WG 200(555/5) Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4644.026.092 6 WG 200(555/5) Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This SKU 4644.026.092 integrates the main gear cluster, clutch packs, and hydraulic control system into a single, ready-to-install assembly. It sits as the core driveline component within the WG 200 series, converting engine torque into precise, multi-speed output for wheel loaders, graders, and industrial tractors. The assembly is engineered to handle high cyclic loads and frequent directional shifts, ensuring minimal downtime in demanding environments.

Symptoms of Failure

When the ZF 4644.026.092 assembly begins to fail, operators often report delayed engagement or gear slipping during forward-to-reverse shifts, a common long-tail search issue. Another frequent symptom is erratic shifting or harsh engagement, where the transmission lurches unexpectedly, indicating worn clutch discs or valve body degradation. External oil leaks around the main housing joints are also prevalent, often traced to degraded seals within the assembly. Finally, loss of power under load—where the machine struggles to maintain speed on inclines—signals internal hydraulic pressure loss or worn planetary gears.

Technical Specifications

Compatibility

This complete assembly is specifically designed for the ZF WG 200 series transmissions, including the WG 180, WG 200, and WG 210 variants. It is a direct replacement for units used in ZF 6 WG 200(555/5) configurations. The assembly is compatible with machines originally equipped with the 4644101216: TRANSMISSION HOUSING or the 4644301223: TRANSMISSION HOUSING, as these housings provide the structural base for the internal gear train. Additionally, the unit requires the correct 0730365067: TYPE PLATE for proper identification and the 0631311009: GROOVED STUD for secure mounting alignment.

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