ZF 4644.036.212 6 WG 201 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4644.036.212 6 WG 201 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This fully assembled gearbox integrates the main drive housing, clutch packs, and hydraulic control elements into a single drop-in replacement. The SKU 4644.036.212 corresponds to the complete assembly, ensuring precise gear engagement under load. It sits as the central driveline component, transferring torque from the engine to the final drive. For structural integrity, this unit mates directly with the TRANSMISSION HOUSING (4644101160) and the TRANSMISSION HOUSING (4644301323), which form the outer casing and support the internal shafts.

Symptoms of Failure

• Delayed or harsh gear engagement: Worn internal clutches or valve body wear cause hesitation when shifting from neutral to drive or between ranges.
• Internal oil leaks at housing seams: Cracks or gasket failure in the main casing lead to fluid loss, often visible as drips near the SCREW PLUG (4475280043) or breather ports.
• Erratic shifting under load: A failing assembly may produce grinding noises or sudden deceleration during power shifts, indicating worn planetary gears or bearing surfaces.
• Overheating transmission fluid: Reduced hydraulic pressure from internal wear causes excessive heat, often accompanied by a burnt odor from the oil.

Technical Specifications

Compatibility

This complete assembly is engineered for the ZF WG 201 series, but its core architecture is shared across the WG 180, WG 200, and WG 210 families. It is a direct fit for machinery originally equipped with the 6 WG 201 powershift, including certain models of loaders, graders, and industrial tractors. The unit requires the THREADED BUSH (4644301189) for proper alignment of the output shaft. Always verify the bell housing pattern and input shaft spline count against your existing transmission before installation.

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