ZF 4616.000.261 4 WG 65 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4616.000.261 4 WG 65 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control circuits into a single drop-in replacement. As the core of the WG 65 series, it manages torque distribution across four forward and reverse speeds. The SKU 4616.000.261 identifies a fully assembled unit, eliminating the need for piecemeal rebuilds. For precise hydraulic modulation, this assembly works in concert with the 4616105416 VALVE, which regulates clutch pressure, and the 0501319251 SOLENOID VALVE, which controls shift timing.

Symptoms of Failure

• Delayed engagement or gear slipping under load: Worn clutch discs or degraded seals inside the assembly cause power loss during acceleration, especially on inclines.
• External oil leaks near the main housing seam: Cracks or gasket failure in the 4616.000.261 unit allow transmission fluid to escape, often pooling around the bell housing.
• Erratic shifting or harsh engagement: Contaminated valve bodies or failing solenoids produce jarring gear changes, often accompanied by a metallic grinding noise.
• Overheating during continuous operation: Internal friction from worn components generates excessive heat, triggering thermal warnings on the dashboard.

Technical Specifications

Compatibility

This complete assembly is engineered for the ZF WG 65 series powershift transmissions. It directly replaces units in the following models: WG65, WG80, WG100, and WG120. It is also backward-compatible with select WG180 and WG200 variants when used with the correct adapter plate. Always verify the bell housing pattern and input shaft spline count before installation. For mounting hardware, use the 0636010047 HEXAGON SCREW and 0630001010 WASHER to secure the assembly to the engine flywheel housing.

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