ZF 4616.303.108 OUTPUT FLANGE for WG65 | OEM Genuine Part

Overview

The ZF 4616.303.108 OUTPUT FLANGE is a critical driveline component engineered for the WG 65 Series transmission family. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the propeller shaft or drive axle, transferring rotational torque from the gearbox to the vehicle’s drivetrain. Machined from high-strength forged steel, the 4616.303.108 flange ensures precise spline engagement and concentric alignment, which is essential for minimizing vibration and wear. When installed, this flange is secured directly to the output shaft and is typically retained using 0636011038: HEXAGON SCREW fasteners, while the entire assembly is housed within the 4616101106: TRANSMISSION HOUSING. Proper torque specification and sealing are mandatory to prevent premature failure of this load-bearing component.

Symptoms of Failure

• Transmission fluid leakage at the output shaft seal: A worn or damaged output flange often causes oil to weep past the seal, leaving visible drips under the bell housing or along the driveshaft. This is a common long-tail search query for “ZF WG65 output flange oil leak.”
• Driveline vibration during acceleration or deceleration: When the flange splines wear or the flange becomes distorted, rotational imbalance occurs, producing a rhythmic shudder felt through the chassis at highway speeds.
• Clunking noise when shifting between forward and reverse: Excessive backlash from a loose or worn output flange creates a metallic impact sound, often described as a “driveline clunk” in heavy-duty applications.
• Premature wear of the output shaft bearing: A failing flange can transfer lateral loads into the transmission, accelerating bearing degradation and leading to gear whine or rough operation.

Technical Specifications

Compatibility

This output flange is specifically designed for the ZF WG 65 Series transmissions, including models such as the WG65, WG120, WG150, WG180, and WG200. It is commonly found in medium- to heavy-duty commercial vehicles, buses, and off-highway equipment. The 4616.303.108 flange interfaces with the output shaft using a splined connection and is secured by 0636011118: HEXAGON SCREW and 0636016015: HEXAGON SCREW fasteners. Always verify the spline count and pilot diameter against your specific transmission model before ordering.

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