ZF 4660.203.013 HELICAL GEAR for WG200/WG92 | OEM Genuine Part

Overview

The ZF 4660.203.013 HELICAL GEAR is a critical power-transfer component engineered for the WG200 and WG92 series transmissions. This OEM genuine part is responsible for meshing with adjacent gear sets to reduce noise and vibration while transmitting torque through the drivetrain. Positioned within the intermediate shaft assembly, the helical gear ensures smooth engagement and consistent load distribution across the gear train. The SKU 4660.203.013 is precision-machined to ZF factory tolerances, making it a direct replacement for worn units in heavy-duty commercial and industrial applications.

Symptoms of Failure

• Whining or howling noise during acceleration: A worn helical gear produces a distinct high-pitched whine that intensifies under load, indicating tooth surface pitting or misalignment.
• Intermittent gear slippage under heavy torque: As the gear teeth wear unevenly, the transmission may momentarily lose engagement, causing a brief loss of power delivery.
• Metallic debris in transmission fluid: Flaking or chipped gear teeth shed fine metal particles into the oil, often visible during routine fluid changes or when inspecting the SUCTION TUBE for contamination.
• Vibration through the shift lever or chassis: Excessive gear backlash from a worn helical gear transmits harmonic vibrations that can be felt in the cab or vehicle frame.

Technical Specifications

Compatibility

This helical gear is designed for ZF WG200 and WG92 series transmissions, including the WG180, WG200, and WG92 variants. It is commonly used in bus, coach, and heavy-truck applications where the transmission is paired with engines producing up to 2,000 Nm of torque. The gear interfaces directly with the TRANSMISSION HOUSING and the HOUSING assembly, and it works in conjunction with the PERIPHERALS kit and the RANGE SELECTOR for proper gear engagement. Always verify your transmission model and serial number before ordering.

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