ZF 4143.316.087 PINION for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.316.087 PINION is a precision-machined gear component engineered for the input or countershaft assembly within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transfers rotational force from the drive shaft to the gear train, directly influencing torque delivery and shift quality. The SKU 4143.316.087 is manufactured to exacting ZF tolerances, ensuring minimal backlash and consistent power flow under heavy-duty industrial loads. It sits adjacent to the 4143101025: HOUSING and the 4143301055: HOUSING, forming a critical interface for bearing support and oil circulation.

Symptoms of Failure

When the 4143.316.087 pinion wears out, operators often notice distinct performance degradation. Gear slipping under load is a primary indicator, as worn teeth fail to maintain positive engagement. Whining or grinding noises from the transmission housing during acceleration or deceleration signal excessive clearance or surface fatigue. Metallic debris in the oil filter or magnetic drain plug confirms material loss from the pinion teeth. Additionally, erratic shifting or delayed engagement can occur when the pinion’s pilot surface wears, affecting alignment with the 4143298040: CASE.

Technical Specifications

Compatibility

This pinion is designed for ZF’s WG-series industrial transmissions, specifically the WG100, WG130, and WG131 models. It also fits select variants of the WG180 and WG200 when used with the correct 0631329135: SPRING PIN for axial retention. The part is not backward-compatible with older WG80 units without modification to the 4143101025: HOUSING. Always verify the tooth count and spline interface against your transmission’s service manual before installation.

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