ZF 4143.203.011 OUTPUT FLANGE | OEM Genuine Part

Overview

The ZF 4143.203.011 OUTPUT FLANGE is a critical OEM genuine component engineered to transfer rotational torque from the transmission output shaft to the driveline. Positioned at the rear of the gearbox housing, this flange ensures a secure, vibration-free connection between the transmission and the propeller shaft. The SKU 4143.203.011 is precision-machined to maintain concentric alignment, preventing premature wear on seals and bearings. This part is integral to the HL 100 Series and HL 270 Series categories, where it interfaces directly with the 4143101022: HOUSING and the 4143301044: HOUSING to form a sealed, durable assembly.

Symptoms of Failure

When the ZF 4143.203.011 OUTPUT FLANGE deteriorates, operators often notice specific failure indicators. Look for these long-tail search queries to diagnose issues early:

• Oil leaks at the transmission output shaft: A worn flange spline or damaged sealing surface allows transmission fluid to escape, leaving puddles under the vehicle.
• Vibration during acceleration or deceleration: Excessive play in the flange-to-shaft connection causes driveline shudder, especially at highway speeds.
• Clunking noise when shifting gears: Loose or cracked flange teeth create a metallic clunk as torque is applied or released.
• Premature seal failure: A warped flange face forces the output seal to wear unevenly, leading to repeated leaks even after seal replacement.

Technical Specifications

Compatibility

This output flange is designed for ZF heavy-duty transmission models that share the same spline geometry and bolt pattern. It is directly compatible with the WG180, WG200, and Ecomat 4 HP 590 series. Additionally, it fits the HL 100 and HL 270 series as listed. Always verify the spline count and pilot bore diameter before installation. When replacing this flange, inspect the 0631329135: SPRING PIN and the 0636302014: SCREW PLUG for wear, as these fasteners secure the assembly to the output shaft.

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