ZF 4661.102.017 INPUT for WG94 | OEM Genuine Part

Overview

The ZF 4661.102.017 INPUT for WG94 is a critical OEM genuine component engineered to transfer rotational force from the torque converter directly into the planetary gearset of the WG 94 Series transmission. This input shaft assembly serves as the primary mechanical interface, absorbing high-torque loads during every shift cycle. The SKU 4661.102.017 is precision-machined to factory tolerances, ensuring concentric alignment with the TRANSMISSION HOUSING and the HOUSING II assembly. Without this part, the transmission cannot engage forward or reverse motion.

Symptoms of Failure

• Delayed engagement or gear slipping: A worn input shaft spline causes intermittent power loss, especially under load, leading to “ZF transmission slipping under acceleration” queries.
• Metallic grinding noises from the bell housing: Bearing surface degradation on the 4661.102.017 produces a distinct whine or grind, often misdiagnosed as torque converter failure.
• Transmission fluid contamination with metal shavings: As the input shaft wears, microscopic debris enters the hydraulic circuit, clogging the PERIPHERALS valve body and reducing line pressure.
• Vibration during gear changes: Imbalance in the input shaft assembly transmits through the RANGE SELECTOR mechanism, causing harsh shifts.

Technical Specifications

Compatibility

This input shaft is specifically designed for the WG 94 Series transmission family, which includes the WG180, WG200, and WG240 models commonly found in municipal trucks, fire apparatus, and heavy-duty off-highway equipment. It is not interchangeable with WG 80 or WG 120 series input shafts due to differences in spline count and pilot bearing diameter. Always verify the transmission serial number against the 4661.102.017 casting marks before installation.

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