ZF 4644.252.091 SPUR GEAR for WG200 | OEM Genuine Part

Overview

The ZF 4644.252.091 SPUR GEAR is a precision-machined component engineered specifically for the WG 200 series transmission. This genuine OEM part, identified by SKU 4644.252.091, functions as a critical power transfer element within the gear train, ensuring smooth torque delivery from the input shaft to the output assembly. Located in the intermediate shaft cluster, this spur gear meshes directly with adjacent gears to maintain correct rotational speeds and load distribution. When installed alongside the 4644101216 TRANSMISSION HOUSING or the 4644301223 TRANSMISSION HOUSING, it forms a robust foundation for heavy-duty industrial applications.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn tooth profiles on the spur gear produce a distinct high-pitched whine under load, often mistaken for bearing failure.
• Intermittent gear slipping under torque: As the gear surface degrades, the transmission may momentarily lose power transfer, causing erratic acceleration or hesitation.
• Metallic debris in transmission fluid: Flaking or pitting of the gear teeth releases fine metal particles into the oil, detectable during routine fluid changes.
• Vibration through the driveline: Uneven wear on the spur gear creates rotational imbalance, transmitting noticeable vibration to the chassis at specific RPM ranges.

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 200 series transmissions, including models WG200, WG201, and WG202. It is also compatible with the WG180 series when used in specific gear train configurations, though verification of tooth count and shaft diameter is recommended. The gear interfaces directly with the 0730365067 TYPE PLATE for identification and the 0631311009 GROOVED STUD for secure mounting within the housing assembly.

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