ZF 4657.303.009 GEAR for WG210 | OEM Genuine Part

Overview

The ZF 4657.303.009 GEAR is a precision-engineered helical gear designed for the WG 210 series transmission. This OEM genuine part sits within the planetary gearset assembly, where it transfers torque from the input shaft to the intermediate shaft, ensuring smooth power delivery under heavy load conditions. The SKU 4657.303.009 is manufactured to ZF’s original specifications, featuring case-hardened steel construction for superior wear resistance. This gear meshes directly with the 4657101040: TRANSMISSION HOUSING and is supported by the 4657201028: HOUS.FRONT SECT to maintain precise alignment during operation.

Symptoms of Failure

• Whining or grinding noise during gear engagement — Worn gear teeth produce a high-pitched whine that intensifies under acceleration, often mistaken for bearing failure.
• Intermittent gear slipping under load — When the gear’s tooth profile degrades, the transmission may momentarily lose torque transfer, causing RPM spikes without corresponding speed increase.
• Metal particles in transmission fluid — Flaking or pitting on the gear surface introduces ferrous debris into the oil, detectable during routine fluid changes or filter inspections.
• Vibration through the drivetrain — Uneven wear on the gear’s helical flanks creates cyclic vibration that transfers to the 4657201013: HOUSING REAR PART, felt as a shudder during steady-state cruising.

Technical Specifications

Compatibility

This gear is primarily used in the ZF WG 210 series transmissions. Based on its design and tooth geometry, it is also compatible with the following ZF models: WG180, WG200, WG211, and WG220. The gear interfaces with the 0631306792: CYLINDRICAL PIN for rotational indexing and requires proper shimming against the 4657101040: TRANSMISSION HOUSING to maintain backlash tolerances. Always verify your transmission’s serial number before ordering.

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