ZF 4616.323.023 SUN GEAR for WG65 | OEM Genuine Part

Overview

The ZF 4616.323.023 SUN GEAR is a critical internal component engineered specifically for the WG 65 series transmission. This OEM genuine part functions as the central driving gear within the planetary gear set, transmitting torque from the input shaft to the planetary gears. Positioned directly within the TRANSMISSION HOUSING, the sun gear meshes with multiple planet gears to achieve the desired gear ratios. The SKU 4616.323.023 ensures precise fitment and durability under high-load conditions, making it essential for maintaining drivetrain efficiency in heavy-duty industrial applications.

Symptoms of Failure

• Gear slipping under load: Worn teeth on the sun gear cause intermittent power loss, especially during acceleration or uphill operation.
• Metallic grinding noises: A distinct whining or grinding sound from the transmission housing indicates advanced wear or pitting on the sun gear surface.
• Oil contamination with metal particles: Debris from a failing sun gear mixes with transmission fluid, visible as metallic shavings during oil changes.
• Erratic shifting behavior: Delayed or harsh gear engagement occurs when the sun gear no longer maintains consistent contact with planet gears.

Technical Specifications

Compatibility

This sun gear is primarily designed for the ZF WG 65 series transmission. Based on its tooth profile and dimensions, it may also be compatible with the following ZF models: WG180, WG200, WG210, and WG250. Always verify fitment with your specific transmission serial number. The sun gear works in conjunction with the OUTPUT shaft and OUTPUT FLANGE to complete the power transfer path. Secure installation requires the use of a HEXAGON SCREW to fasten the assembly properly.

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