ZF 4644.105.020 DISCONNECTION for WG200 | OEM Genuine Part

Overview

The ZF 4644.105.020 DISCONNECTION is a critical OEM genuine component engineered specifically for the WG 200 Series transmission. This part functions as the primary torque interruption mechanism, enabling the driveline to be safely separated from the engine output during maintenance or emergency stops. Positioned within the transmission’s rear power take-off (PTO) assembly, the disconnection unit ensures that rotational force is halted without damaging adjacent gears or shafts. The SKU 4644.105.020 is precision-machined to ZF’s exacting tolerances, guaranteeing seamless integration with the 4644105423: DISCONNECTION and the 4644303054: OUTPUT FLANGE to maintain driveline integrity.

Symptoms of Failure

When the ZF 4644.105.020 disconnection unit begins to degrade, operators often notice specific performance issues. Oil leaks from the PTO housing are a primary indicator, as worn seals allow transmission fluid to escape under pressure. Another common symptom is gear slipping during load engagement, where the disconnection fails to hold torque, causing intermittent power loss. Additionally, abnormal grinding noises when shifting into neutral suggest internal wear on the splines or clutch pack. Finally, delayed engagement after disconnection—a lag of several seconds before the driveline re-engages—points to hydraulic pressure loss within the 4644.105.020 assembly.

Technical Specifications

Compatibility

This genuine ZF disconnection part is primarily designed for the WG 200 Series transmissions, including models WG200, WG180, and WG210. It also fits select WG150 variants when used with the appropriate 4644101231: TRANSMISSION HOUSING and 0636021010: HEXAGON SCREW fasteners. For heavy-duty applications in construction or agricultural machinery, verify that your transmission’s shift system aligns with the 4644.105.020’s spline count. Always consult your ZF service manual before installation.

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