ZF 4661.172.023 COUPLING for WG 90/WG 94 | OEM Genuine Part

Overview

The ZF 4661.172.023 COUPLING is a precision-engineered component designed for the WG 90 and WG 94 series transmissions. This OEM genuine part serves as the critical interface between the torque converter and the transmission input shaft, ensuring smooth power transfer and torsional vibration dampening. The 4661.172.023 coupling is housed within the main 4661101020 TRANSMISSION HOUSING and works in conjunction with the 4661301046 HOUSING II to maintain proper alignment and fluid flow. This coupling directly affects shift quality and overall drivetrain efficiency in heavy-duty applications.

Symptoms of Failure

• Torque converter shudder during acceleration – A noticeable vibration or shaking when the vehicle is under load, particularly between 1200-1800 RPM, indicates the coupling has lost its dampening capacity.
• ATF fluid contamination with metallic particles – Worn splines or friction surfaces on the coupling shed metal debris into the transmission fluid, often visible during routine oil changes.
• Delayed or harsh gear engagement – The coupling’s inability to properly transmit torque causes a lag when shifting from Neutral to Drive or Reverse, followed by an abrupt engagement.
• Whining noise from the bell housing area – A high-pitched metallic sound that increases with engine RPM suggests the coupling’s bearing surfaces are worn beyond tolerance.

Technical Specifications

Compatibility

This coupling is specifically engineered for the ZF WG 90 and WG 94 series transmissions. Based on its design and dimensions, it is also compatible with the following ZF transmission models that share the same torque converter interface: WG 180, WG 200, WG 210, and WG 240. The part interfaces directly with the 4661301093 TUBE for lubrication flow and is secured using the 0631306174 CYLINDRICAL PIN for precise rotational alignment. Always verify your transmission serial number before ordering.

Related Components