ZF 4646.153.423 COUPLING for WG 250/WG 260/WG 310 | OEM Genuine Part

Overview

The ZF 4646.153.423 COUPLING is a critical OEM genuine component engineered for the WG 250, WG 260, and WG 310 transmission series. This precision-machined coupling serves as the primary torque transfer interface between the transmission output shaft and the driveline, ensuring seamless power delivery under heavy-duty industrial loads. As a direct replacement part, the SKU 4646.153.423 is designed to maintain the exact OEM tolerances required for ZF’s modular transmission architecture. It sits directly within the rear housing assembly, where it mates with the TRANSMISSION HOUSING and is secured by the HEXAGON SCREW fasteners to prevent axial play.

Symptoms of Failure

• Driveline vibration under load: A worn 4646.153.423 coupling causes excessive backlash, leading to noticeable shuddering or shaking during acceleration, especially in WG 250-equipped vehicles.
• Metallic clunking on gear engagement: When the coupling splines wear, operators hear a distinct “clunk” when shifting from neutral to drive or reverse, indicating lost torque transfer precision.
• Oil seepage at the output flange: A degraded coupling can compromise the seal interface with the HOUSING, resulting in transmission fluid leaks around the rear output area.
• Intermittent power loss: As the coupling wears unevenly, it may slip under high torque demands, causing temporary loss of drive until the load decreases.

Technical Specifications

Compatibility

This OEM coupling is specifically designed for ZF’s WG series powershift transmissions. It is a direct fit for the WG 250, WG 260, and WG 310 models commonly used in construction and agricultural machinery. The part also shares compatibility with earlier WG 180 and WG 200 variants when used with the appropriate COVER adapter. Always verify your transmission serial number before installation.

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