ZF 4616.323.019 RING GEAR for WG65 | OEM Genuine Part

Overview

The ZF 4616.323.019 RING GEAR is a critical internal component engineered specifically for the WG 65 Series transmission. This OEM genuine part functions as the primary driven gear within the planetary gearset, transferring torque from the sun gear to the output shaft while maintaining precise rotational alignment. As a high-stress component, the ring gear directly influences shift quality and overall driveline efficiency. The SKU 4616.323.019 is manufactured to ZF’s exacting tolerances, ensuring seamless meshing with the planetary pinions and long-term durability under heavy-duty industrial loads. When replacing this ring gear, it is essential to also inspect the 4616101059: TRANSMISSION HOUSING for wear or distortion, as housing integrity directly affects gear alignment.

Symptoms of Failure

• Audible gear whine or grinding during acceleration: A worn 4616.323.019 ring gear produces a distinct high-pitched whine that intensifies under load, often mistaken for bearing noise. This occurs as gear tooth profiles become uneven.
• Intermittent gear slipping or delayed engagement: When the ring gear’s internal teeth wear, the planetary pinions can lose positive engagement, causing the transmission to momentarily slip between gears, especially during upshifts.
• Metallic debris in transmission fluid: Flakes or fine metallic particles found during fluid changes indicate advanced ring gear wear. This debris often circulates through the system, damaging the 0732611049: FILTER INSERT and other hydraulic components.
• Vibration through the driveline at specific RPM ranges: A chipped or cracked ring gear creates rotational imbalance, transmitting noticeable vibration through the chassis at cruising speeds.

Technical Specifications

Compatibility

This ring gear is a direct fit for the ZF WG 65 Series transmission family. Based on its design and spline configuration, the 4616.323.019 is also compatible with the following ZF models: WG65, WG80, WG100, WG120, WG150, WG180, and WG200. It is commonly used in municipal trucks, refuse vehicles, and medium-duty construction equipment. For proper installation, always use new 0636011038: HEXAGON SCREW and 0636011118: HEXAGON SCREW fasteners, as these are torque-to-yield components that must not be reused. Additionally, the 0636016015: HEXAGON SCREW secures the ring gear carrier assembly and should be replaced simultaneously.

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