ZF 4661.173.005 COUPLING for WG 90/WG 94 | OEM Genuine Part

Overview

The ZF 4661.173.005 COUPLING is a precision-engineered OEM genuine component designed for the WG 90 and WG 94 transmission series. This coupling serves as the critical mechanical link between the transmission housing and the output shaft assembly, ensuring torque transfer with minimal backlash. Positioned within the drivetrain’s power flow, the 4661.173.005 coupling absorbs torsional vibrations and maintains alignment between rotating elements. As a factory-spec replacement, this SKU restores original performance characteristics in heavy-duty industrial applications where reliability is non-negotiable.

Symptoms of Failure

• Transmission gear slipping under load – A worn 4661.173.005 coupling can cause intermittent power loss, especially during acceleration or uphill operation, as the coupling teeth lose engagement.
• Metallic grinding or clunking noises – When the coupling splines wear unevenly, operators often report audible chatter from the bell housing area, particularly during gear changes.
• Oil leaks near the output flange – Degraded coupling seals allow transmission fluid to escape, leaving puddles under the vehicle and reducing hydraulic pressure.
• Vibration in the driveline – Excessive play in the coupling creates harmonic oscillations felt through the chassis at specific RPM ranges, accelerating wear on adjacent components.

Technical Specifications

Compatibility

This coupling is engineered for ZF WG series transmissions, specifically the WG 90 and WG 94 models. It also fits select variants of the WG180 and WG200 series when used with the appropriate 4661101016: TRANSMISSION HOUSING. For proper installation, ensure the 4661301049: HOUSING II is free of cracks and the 0631306174: CYLINDRICAL PIN is aligned correctly. The coupling interfaces directly with the 4661301093: TUBE for oil circulation. Always verify spline count and pilot bore dimensions against your transmission’s serial number before ordering.

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