ZF 4644.026.347 WENDEGETRIEBE Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4644.026.347 WENDEGETRIEBE Powershift Transmission Assembly is a complete, factory-matched unit designed for the WG 200 Series. This assembly serves as the core directional and speed control module within the transmission, managing power flow during forward and reverse operations. As a complete unit, it integrates the shift mechanism, clutch packs, and hydraulic passages into a single, ready-to-install component. The SKU 4644.026.347 is a direct replacement for worn or failed assemblies, ensuring that your ZF powershift transmission returns to OEM-specified performance without the need for individual part sourcing or complex rebuilds.

Symptoms of Failure

When the ZF 4644.026.347 assembly begins to fail, operators often notice delayed engagement when shifting between forward and reverse, a classic sign of internal wear. Another common symptom is intermittent gear slipping under heavy load, particularly when the transmission is hot, which indicates degraded clutch pack clearance. You may also detect hydraulic oil leaks from the shift housing area, often caused by seal fatigue or housing cracks. Finally, erratic or no response to shift commands is a critical failure mode, frequently traced back to a seized or broken WENDEGETRIEBE mechanism within this assembly.

Technical Specifications

Compatibility

This complete unit is specifically engineered for the ZF WG 200 Series powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG210 variants used in agricultural tractors, construction loaders, and industrial material handlers. The assembly is also suitable for select ZF WG 150 Series applications where a WENDEGETRIEBE upgrade is specified. Always verify your transmission model number before ordering.

Installation Context

During replacement of the 4644.026.347 unit, several adjacent components must be inspected and often replaced concurrently. The 4644105423 DISCONNECTION coupling must be checked for spline wear, as a worn disconnection can cause premature failure of the new assembly. The 4644303054 OUTPUT FLANGE should be torqued to specification using a new 0636021010 HEXAGON SCREW to ensure proper clamping force. Additionally, the 4644101232 TRANSMISSION HOUSING must be free of cracks or distortion to guarantee correct alignment of the complete unit.

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