ZF 4143.303.077 OUTPUT GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.303.077 OUTPUT GEAR is a critical power transmission component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part transfers rotational force from the planetary gearset to the output shaft, directly influencing vehicle driveline performance. As a precision-machined gear, it interfaces with the 4143101030 HOUSING and the 4143298040 CASE to maintain proper gear alignment and load distribution. The SKU 4143.303.077 is a direct replacement for worn units, ensuring minimal downtime for industrial equipment.

Symptoms of Failure

• Transmission gear slipping under load: A worn output gear loses tooth engagement, causing intermittent power loss during acceleration or hill climbing.
• Metallic grinding noise from the gear housing: Damaged gear teeth produce a distinct scraping sound, particularly noticeable at low speeds or during gear changes.
• Oil contamination with metal particles: As the gear surface degrades, fine metallic debris enters the transmission fluid, visible during oil changes or filter inspections.
• Vibration through the drivetrain: Uneven wear on the output gear creates rotational imbalance, felt as a shudder in the vehicle chassis at highway speeds.

Technical Specifications

Compatibility

This output gear is designed for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It is also compatible with HL 100 Series and HL 270 Series transfer cases where the gear interfaces with the 4143301055 HOUSING. For proper installation, the gear must be secured using a 0631329135 SPRING PIN to prevent axial movement. While primarily used in WG180 and WG200 configurations, cross-referencing with your transmission serial number is recommended before ordering.

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