ZF 4143.303.083 OUTPUT GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.303.083 OUTPUT GEAR is a critical drivetrain component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational force from the planetary gear set to the output flange, directly influencing torque delivery and vehicle propulsion. Machined from high-strength alloy steel, the gear interfaces precisely with the 4143101022: HOUSING and the 4143301044: HOUSING to maintain concentric alignment under heavy loads. The SKU 4143.303.083 is a direct replacement for worn units, ensuring factory-specified backlash and noise reduction in ZF powershift transmissions.

Symptoms of Failure

• Audible gear whine or grinding: Worn teeth on the output gear produce a high-pitched noise during acceleration, especially under load in WG100 series units.
• Oil contamination with metallic debris: Flaking or pitting of the gear surface introduces steel particles into the transmission fluid, often visible during drain intervals.
• Intermittent power loss or slipping: A damaged output gear fails to maintain positive engagement, causing hesitation or momentary loss of drive in WG130 and WG131 models.
• Vibration through the driveline: Eccentric wear or tooth breakage creates cyclical vibration that intensifies at specific RPM ranges, detectable in the chassis or shift lever.

Technical Specifications

Compatibility

This output gear is designed for ZF WG-series powershift transmissions, specifically the WG100, WG130, and WG131 models. It also fits select HL 100 and HL 270 series transfer cases where the output shaft geometry matches. The gear is not compatible with WG180 or WG200 series without verification of spline count and pilot bore dimensions. For correct installation, always pair this gear with the 0631329135: SPRING PIN to secure the hub, and use the 0636302014: SCREW PLUG to seal the oil gallery in the output shaft.

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