ZF 4660.271.020 COUPLING for WG 92/WG 98 | OEM Genuine Part

Overview

The ZF 4660.271.020 COUPLING is a critical torque-transfer component engineered for the WG 92 and WG 98 transmission series. This OEM genuine part sits directly between the engine output flange and the transmission input shaft, ensuring smooth power delivery and dampening torsional vibrations. The SKU 4660.271.020 is precision-machined to maintain concentric alignment within the bell housing, directly interfacing with the 4660101017: TRANSMISSION HOUSING to prevent axial play. When paired with the 4660301054: HOUSING II, this coupling forms a sealed, lubricated assembly that withstands high cyclic loads in heavy-duty industrial applications.

Symptoms of Failure

• Torque converter shudder at low RPM: A worn coupling causes intermittent slip, producing a distinct vibration during acceleration from a standstill.
• Metallic grinding noise from bell housing: Degraded splines or cracked coupling teeth generate a high-pitched scraping sound, especially under load.
• Transmission fluid contamination with metal particles: As the coupling wears, fine metallic debris enters the oil circuit, often detected during routine filter inspections.
• Erratic gear engagement in WG 92 models: A failing coupling disrupts hydraulic pressure modulation, leading to delayed or harsh shifts between forward gears.

Technical Specifications

Compatibility

This coupling is designed for ZF WG 92 and WG 98 off-highway transmissions, commonly found in wheel loaders, graders, and compactors. It is directly compatible with the following models: WG 92, WG 98, WG 180, WG 200. The part also fits select WG 150 variants when used with the 0631306174: CYLINDRICAL PIN for alignment. For proper identification, always cross-reference the 0769123894: TYPE PLATE on your transmission housing to confirm the exact series revision.

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