ZF 4642.303.126 OUTPUT FLANGE for WG150 | OEM Genuine Part

Overview

The ZF 4642.303.126 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 150 Series transmission. 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. Machined from high-strength forged steel, the flange ensures precise alignment and vibration-free power delivery under heavy-duty operating conditions. The SKU 4642.303.126 is a direct replacement unit that maintains factory tolerances for bolt-hole patterns and spline engagement, making it essential for drivetrain integrity in industrial and commercial applications.

Symptoms of Failure

• Transmission fluid seepage at the output shaft seal: A worn or cracked output flange often damages the rear oil seal, leading to visible drips of ATF or gear oil beneath the vehicle. This is a common long-tail search query for “ZF WG150 output flange oil leak.”
• Driveline vibration during acceleration: When the flange’s splines wear or the mating surface becomes distorted, it creates rotational imbalance. Operators may notice a pronounced shudder between 30-50 mph, often searched as “WG150 transmission vibration under load.”
• Clunking noise on gear engagement: Excessive play between the flange and output shaft produces a metallic “clunk” when shifting from Park to Drive or Reverse. This symptom is frequently described in service manuals as “output flange backlash failure.”
• Driveshaft bolt loosening or shearing: A warped flange face prevents proper torque retention on the driveshaft bolts, causing repeated fastener failure. Technicians searching for “ZF output flange bolt pattern damage” will find this part as the root cause.

Technical Specifications

Compatibility

This output flange is primarily designed for the ZF WG 150 Series transmission, but it also fits select variants within the broader WG family. Based on spline geometry and bolt pattern analysis, the 4642.303.126 is compatible with the following ZF models: WG150, WG180, WG200, and early production WG250 units. Always verify the output shaft spline count and pilot bore diameter before installation. The flange interfaces directly with the TRANSMISSION HOUSING (4642101047) and the TRANSMISSION HOUSING (4642301207) to ensure concentric alignment. For identification purposes, the TYPE PLATE (0730365067) should be cross-referenced, and the flange is secured using the GROOVED STUD (0631311009) for proper torque retention.

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