ZF 4005.303.005 OUTPUT FLANGE for WG65 | OEM Genuine Part

Overview

The ZF 4005.303.005 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 65 Series transmission family. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the driveshaft, transferring rotational torque from the gearbox to the vehicle’s axles. Constructed from high-strength alloy steel, the flange ensures precise alignment and vibration-free power delivery under heavy-duty operating conditions. The SKU 4005.303.005 is machined to exact OEM tolerances, guaranteeing a secure spline fit and long service life in demanding industrial applications such as construction, mining, and municipal vehicles.

Symptoms of Failure

• Transmission fluid seepage at the output shaft: A worn or cracked output flange often leads to oil weeping past the seal, leaving visible drips under the vehicle and reducing fluid levels.
• Driveline vibration during acceleration: When the flange’s splines or bolt holes become elongated, rotational imbalance causes noticeable shuddering, especially at highway speeds.
• Clunking noise on gear engagement: Excessive backlash between the flange and output shaft produces a metallic knock when shifting from neutral to drive or reverse.
• Premature wear of the output seal: A damaged flange surface accelerates seal degradation, leading to recurrent leaks and the need for frequent seal replacements.

Technical Specifications

Compatibility

This output flange is designed for the ZF WG 65 Series, but its mounting pattern and spline dimensions also make it compatible with select models in the broader WG family. Verified applications include the WG65, WG80, and WG100 transmissions used in mid-range wheel loaders, forklifts, and telehandlers. For heavy-duty variants such as the WG180 or WG200, always cross-reference the output shaft diameter and bolt pattern before installation.

During replacement, it is common practice to inspect and replace the 4616105402 OUTPUT assembly if wear is present on the mating splines. The 4616101119 TRANSMISSION HOUSING should also be checked for cracks or distortion at the flange mounting face. Secure the flange using 0636011038 HEXAGON SCREW and 0636011118 HEXAGON SCREW fasteners, torqued to factory specifications to prevent loosening under load.

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