ZF 4660.171.015 COUPLING for WG 92/WG 98 | OEM Genuine Part

Overview

The ZF 4660.171.015 COUPLING is a critical driveline component engineered specifically for the WG 92 and WG 98 series transmissions. This OEM genuine part serves as the primary torque-transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery under heavy-duty industrial loads. The SKU 4660.171.015 is precision-machined to maintain concentric alignment, reducing vibration and wear on adjacent assemblies. It sits directly behind the 4660101020: TRANSMISSION HOUSING and interfaces with the 4660301056: HOUSING II to form a sealed, oil-lubricated chamber.

Symptoms of Failure

• Transmission oil leaks at the bell housing: A worn coupling can cause seal degradation, leading to visible drips near the WG 98 series mounting flange.
• Audible clunking or knocking during gear engagement: Backlash from a fatigued coupling produces metallic noises when shifting from neutral to drive.
• Vibration under load at highway speeds: Imbalance in the coupling assembly transfers through the 0631306174: CYLINDRICAL PIN, causing steering wheel or floorboard shake.
• Intermittent gear slipping or delayed engagement: Loss of torsional rigidity prevents full torque transfer, mimicking clutch or valve body issues.

Technical Specifications

Compatibility

This coupling is designed for the ZF WG 92 and WG 98 series transmissions, commonly found in medium-duty trucks, buses, and construction equipment. It is also compatible with the following ZF models when used with the correct TRANSMISSION HOUSING and CYLINDRICAL PIN kit: WG180, WG200, WG210, and WG220. Always verify spline count (typically 24-tooth) against your existing assembly before installation.

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