ZF 4616.308.021 GEAR for WG65 | OEM Genuine Part

Overview

The ZF 4616.308.021 GEAR is a precision-engineered component specifically designed for the WG 65 Series transmission. This OEM genuine part functions as a critical drive gear within the planetary gearset, transferring torque from the input shaft to the output assembly. Positioned in the intermediate shaft cluster, the 4616.308.021 gear ensures smooth power delivery and load distribution under heavy-duty operating conditions. The SKU 4616.308.021 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life when paired with the TRANSMISSION HOUSING and associated fasteners.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn gear teeth produce a high-pitched whine or metallic grinding, especially under load, indicating the 4616.308.021 gear has lost its surface hardness.
• Intermittent gear slipping under torque: A failing gear may cause the transmission to momentarily slip out of gear during acceleration, leading to RPM spikes without corresponding speed increase.
• Metal particles in transmission fluid: Flaking or chipped gear teeth shed metallic debris into the oil, often visible during routine fluid changes as fine silver or dark particles.
• Vibration through the driveline: Uneven wear on the gear’s helical teeth creates cyclic vibrations that can be felt in the vehicle chassis at specific speeds.

Technical Specifications

Compatibility

This gear is engineered for the ZF WG 65 Series transmission family, which includes models such as WG65, WG80, WG100, WG120, WG150, WG180, and WG200. It is a direct replacement for the OEM gear in these heavy-duty off-highway and industrial transmissions. Always verify the gear’s tooth profile and spline count against your transmission’s service manual. For secure installation, use the HEXAGON SCREW and HEXAGON SCREW fasteners to prevent loosening under high vibration.

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