ZF 4644.303.054 OUTPUT FLANGE for WG200 | OEM Genuine Part

Overview

The ZF 4644.303.054 OUTPUT FLANGE is a critical driveline component engineered specifically for the WG 200 series powershift transmissions. This OEM genuine part serves as the mechanical interface between the transmission output shaft and the vehicle’s drive shaft, transferring torque from the planetary gearset to the differential or final drive. Machined from high-strength forged steel, the flange ensures precise rotational alignment and spline engagement. The SKU 4644.303.054 is a direct replacement for original factory equipment, guaranteeing a perfect fit and long service life in heavy-duty off-highway applications such as wheel loaders, graders, and dump trucks.

Symptoms of Failure

• Transmission fluid leaks at the output seal area: A worn or cracked output flange can damage the lip seal, causing oil to weep or stream from the rear of the transmission housing. This is often noticed as puddling under the vehicle after shutdown.
• Vibration or driveline shudder during acceleration: Spline wear on the flange bore or pilot diameter leads to rotational play, producing a rhythmic shudder that intensifies under load.
• Clunking noise when shifting between forward and reverse: Excessive backlash from a fatigued flange creates a metallic clunk as torque direction changes, indicating imminent spline stripping.
• Driveline disconnection or loss of power to the wheels: In severe cases, a fractured flange can separate completely, resulting in sudden loss of propulsion—a critical safety hazard in mining or construction environments.

Technical Specifications

Compatibility

This output flange is primarily designed for the ZF WG200 series transmission, but it also fits select variants of the WG180 and WG210 models that share the same output shaft spline geometry. It is commonly used in ZF 4WG200, 6WG200, and WG200-2 power shift transmissions found in articulated dump trucks, wheel loaders, and telehandlers. Always verify the spline count and pilot diameter against your existing flange before ordering.

Related Components

When replacing the output flange, it is recommended to inspect and replace associated hardware to prevent future failures. The flange is secured to the output shaft using a 0636021010: HEXAGON SCREW and sealed against the 4644101229: TRANSMISSION HOUSING or 4644301227: TRANSMISSION HOUSING. A 4644105423: DISCONNECTION assembly is often paired with this flange in clutch pack service kits.