ZF 4143.303.080 OUTPUT GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.303.080 OUTPUT GEAR is a precision-machined component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational torque from the countershaft to the output flange, directly influencing driveline efficiency and load-holding capability. As a critical element within the Gears & Shafts category, the 4143.303.080 interfaces with the 4143101030: HOUSING to maintain proper gear mesh alignment. The SKU 4143.303.080 is manufactured to ZF’s original metallurgical specifications, ensuring consistent hardness and wear resistance under high-cycle industrial duty.

Symptoms of Failure

• Audible whining or grinding noise during acceleration: Worn gear teeth on the 4143.303.080 produce a high-pitched whine that intensifies under load, often misdiagnosed as bearing failure.
• Oil contamination with metallic debris: Flaking or pitting on the output gear deposits ferrous particles into the sump, which can be detected during routine oil analysis.
• Intermittent gear slipping under torque: Advanced wear reduces the gear’s ability to maintain positive engagement, causing momentary power loss when climbing grades or reversing.
• Excessive backlash at the output flange: Measurable rotational play exceeding 0.5 mm indicates the gear’s splines or tooth profile have degraded beyond service limits.

Technical Specifications

Compatibility

This output gear is directly compatible with ZF WG100, WG130, and WG131 transmissions. It also fits select HL 100 Series and HL 270 Series applications where the output shaft spline count and center distance match the 4143.303.080 geometry. For WG180 or WG200 models, verify the gear ratio and shaft diameter before installation. The gear mounts inside the 4143301055: HOUSING and is secured by the 0631329135: SPRING PIN to prevent axial migration. The 4143298040: CASE encloses the gear assembly, requiring removal for access during replacement.

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