ZF 4143.316.085 PINION for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.316.085 PINION is a critical gear component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part functions as the primary drive gear within the countershaft assembly, transferring rotational force from the input shaft to the output shaft through the planetary gear set. Precision-machined to exact ZF tolerances, the 4143.316.085 pinion ensures smooth torque delivery and minimal backlash in heavy-duty industrial applications. It is frequently replaced alongside the 4143101022 HOUSING and 4143301044 HOUSING during major transmission overhauls to maintain gear mesh integrity.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn pinion teeth create irregular contact patterns, producing audible metallic sounds that intensify under load—a common long-tail search query for “ZF transmission whining noise fix.”
• Intermittent gear slipping under heavy torque: As the pinion’s tooth profile degrades, the transmission may momentarily lose power transfer, especially during uphill climbs or when towing, matching searches for “WG130 gear slipping causes.”
• Metallic debris in transmission fluid: Flaking or pitting on the pinion surface releases fine steel particles into the oil, detectable during routine fluid changes—often searched as “metal shavings in ZF transmission oil.”
• Vibration through the driveline: Uneven wear on the pinion creates rotational imbalance, causing noticeable shuddering at specific RPM ranges, a symptom frequently queried as “ZF transmission vibration at highway speed.”

Technical Specifications

Compatibility

This pinion is specifically designed for ZF’s WG100, WG130, and WG131 series transmissions, commonly found in medium-duty trucks, construction loaders, and agricultural tractors. It also fits select variants of the WG180 and WG200 models when used with the appropriate 0631329135 SPRING PIN for shaft retention. For WG270 and HL 100/HL 270 series applications, verify the housing bore dimensions; the 0636302014 SCREW PLUG is often required to seal the access port during installation. Always cross-reference your transmission’s serial number with ZF’s OEM catalog to confirm fitment.

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