ZF 4661.172.012 COUPLING for WG 90/WG 94 | OEM Genuine Part

Overview

The ZF 4661.172.012 COUPLING is a critical torque-transfer component engineered specifically for the WG 90 and WG 94 transmission series. This OEM genuine part serves as the mechanical link between the engine output and the transmission input shaft, ensuring smooth power delivery and dampening torsional vibrations. The SKU 4661.172.012 is precision-machined to maintain concentric alignment within the driveline, directly interfacing with the 4661101024: TRANSMISSION HOUSING to form a sealed, high-torque assembly. Without this coupling, the transmission cannot engage properly, making it a non-negotiable element for any rebuild or overhaul of the WG 94 system.

Symptoms of Failure

When the ZF 4661.172.012 coupling begins to wear, operators will notice distinct performance degradation. Transmission gear slipping under load is a primary indicator, as the coupling loses its ability to maintain positive engagement. Oil leaks at the bell housing interface frequently occur when the coupling’s sealing surface degrades, allowing hydraulic fluid to escape. Abnormal driveline vibration or shuddering during acceleration signals that the coupling’s damping properties have failed. Finally, difficulty shifting between forward and reverse gears often points to this part’s inability to synchronize rotational speed, a common long-tail search query for WG 94 repairs.

Technical Specifications

Compatibility

This coupling is factory-specified for the ZF WG 94 series transmissions, including the WG 94-2, WG 94-4, and WG 94-6 variants. It is also backward-compatible with the WG 90 series (WG 90-1, WG 90-3) when used in conjunction with the correct 4661301054: HOUSING II. For installations requiring precise alignment, the 0631306174: CYLINDRICAL PIN must be installed to secure the coupling to the input shaft. Always verify the 0769123894: TYPE PLATE on your transmission to confirm the exact model variant before ordering.

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