ZF 4644.203.034 OUTPUT FLANGE for WG180/WG200 | OEM Genuine Part

Overview

The ZF 4644.203.034 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG180 and WG200 series transmissions. 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 axle. Constructed from high-strength forged steel, the flange ensures precise alignment and vibration-free power delivery under heavy-duty industrial loads. The SKU 4644.203.034 is machined to exact ZF tolerances, guaranteeing a secure spline fit and long service life when paired with the correct TRANSMISSION HOUSING (4644101043) or TRANSMISSION HOUSING (4644301194).

Symptoms of Failure

• Transmission fluid seepage at the output shaft: A worn flange or damaged sealing surface allows oil to escape, often visible as drips under the bell housing.
• Driveline vibration during acceleration: Excessive play between the flange splines and output shaft causes rhythmic shaking, especially at highway speeds.
• Clunking noise when shifting gears: Backlash from a loose or cracked flange produces a metallic impact sound during torque reversal.
• Difficulty engaging or holding gear: A failing flange can misalign the output shaft, leading to intermittent gear slippage or harsh engagement.

Technical Specifications

Compatibility

This output flange is designed for the ZF WG180 and WG200 series transmissions, commonly found in medium-duty trucks, buses, and off-highway equipment. It directly replaces the original flange on models including WG180, WG180-1, WG200, and WG200-1. For proper installation, ensure the transmission is equipped with the correct TYPE PLATE (0730365067) to verify model identification. The flange is secured using a GROOVED STUD (0631311009) and requires a new sealing ring for reassembly.

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