ZF 4644.337.008 SPUR GEAR for WG150 | OEM Genuine Part

Overview

The ZF 4644.337.008 SPUR GEAR is a critical power transmission component engineered for the WG 150 series. This OEM genuine part is responsible for transferring rotational force between parallel shafts within the transmission’s gear train, ensuring smooth torque delivery and precise speed regulation. Positioned within the intermediate shaft assembly, the spur gear directly engages with adjacent gears to maintain synchronized operation under heavy load. The SKU 4644.337.008 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life. When replacing this gear, it is essential to inspect the 4642101109: TRANSMISSION HOUSING and 4642301205: TRANSMISSION HOUSING for wear, as these housings provide the critical alignment and support for the gear set.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn or chipped teeth on the spur gear produce a distinct metallic sound, often worsening under acceleration. This is a common long-tail search query for “ZF WG150 gear noise.”
• Intermittent gear slippage or loss of drive: As the gear’s tooth profile degrades, it fails to maintain positive engagement, causing the transmission to momentarily lose power. Operators may notice “WG150 transmission slipping under load.”
• Metallic debris in the transmission oil: Flaking or pitting of the gear surface releases fine metal particles into the lubricant. This symptom is frequently searched as “metal shavings in ZF transmission fluid.”
• Vibration through the driveline: An unevenly worn spur gear creates rotational imbalance, transmitting vibration to the chassis. This is a key indicator for “ZF spur gear vibration diagnosis.”

Technical Specifications

Compatibility

This spur gear is primarily designed for the ZF WG 150 series, but it also fits select variants in the WG 180 and WG 200 families due to shared gear train architecture. It is commonly used in WG 150-60, WG 150-80, and WG 180-90 models. For proper installation, ensure the 0730365125: TYPE PLATE is referenced to confirm the exact transmission configuration. Additionally, the 0631311009: GROOVED STUD must be torqued to specification to secure the gear assembly. Always verify compatibility with your transmission’s serial number before ordering.

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