ZF 4627.303.001 OUTPUT FLANGE for WG150 | OEM Genuine Part

Overview

The ZF 4627.303.001 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 vehicle’s driveshaft, transferring rotational torque from the gearbox to the wheels. Constructed from high-strength alloy steel, the flange ensures precise alignment and vibration-free power delivery under heavy-duty operating conditions. The SKU 4627.303.001 is machined to exact ZF tolerances, guaranteeing a direct bolt-on replacement without modification. It mounts directly onto the output shaft and is secured using the 0631311009: GROOVED STUD, which provides a locking interface to prevent loosening during high-torque cycles.

Symptoms of Failure

• Transmission fluid seepage at the rear seal: A worn output flange often damages the rear oil seal, leading to visible drips or wetness around the driveshaft connection point. This is a common search query for “ZF WG150 rear oil leak.”
• Driveline vibration under load: Spline wear or flange runout causes rhythmic shaking during acceleration, particularly between 30-50 mph. This symptom is frequently searched as “ZF transmission vibration when accelerating.”
• Clunking noise during gear engagement: Excessive backlash from a loose or cracked flange produces a metallic thud when shifting from Park to Drive or Reverse. Technicians often search for “ZF output flange clunk fix.”
• Driveshaft bolt shearing: A distorted flange face creates uneven stress on fasteners, leading to repeated bolt failures. This is a critical safety issue often queried as “ZF WG150 driveshaft bolt keeps breaking.”

Technical Specifications

Compatibility

While the 4627.303.001 is primarily designed for the WG 150 Series, its spline geometry and bolt pattern also suit the WG 180 and WG 200 transmissions used in municipal buses and medium-duty trucks. It is not compatible with the WG 120 or WG 250 series due to differing shaft diameters. For proper installation, always pair this flange with a new 4642101109: TRANSMISSION HOUSING or 4642301205: TRANSMISSION HOUSING if the original housing shows wear at the seal bore. Additionally, verify the 0730365125: TYPE PLATE on your transmission to confirm the exact series variant before ordering.

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