ZF 2095.309.069 SUN GEAR SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2095.309.069 Sun Gear Shaft is a critical internal component engineered for the WG100, WG130, and WG131 transmission series. This genuine OEM part functions as the central torque-transfer element within the planetary gear set, directly meshing with planetary pinions to modulate speed and torque distribution. Positioned along the main shaft axis, the 2095.309.069 sun gear shaft interfaces with the 2095109020: DIFFERENTIAL assembly to ensure smooth power delivery under heavy loads. Precision-ground teeth and hardened alloy construction allow this shaft to withstand extreme cyclic stresses in commercial vehicle drivetrains.

Symptoms of Failure

• Whining or grinding noise during gear engagement: Worn sun gear shaft teeth create irregular meshing patterns, producing a distinct metallic whine that intensifies under acceleration.
• Intermittent gear slipping under load: As the shaft surface degrades, torque transfer becomes inconsistent, causing the transmission to momentarily lose drive power when climbing grades or hauling heavy payloads.
• Metallic debris in transmission fluid: Flaking or pitting on the sun gear shaft releases ferrous particles into the oil, often visible during routine fluid changes as silver or dark sludge.
• Vibration through the driveline: A worn shaft creates rotational imbalance, transmitting low-frequency shuddering through the chassis that worsens at highway speeds.

Technical Specifications

Compatibility

This genuine ZF sun gear shaft is specifically designed for the following transmission models: WG100, WG130, and WG131. These units are commonly found in medium-duty trucks, municipal vehicles, and agricultural machinery. The 2095.309.069 shaft is not interchangeable with WG180 or WG200 series transmissions due to differences in spline pitch and shaft diameter. When replacing this component, always inspect the mating 0750117075: TAPER ROLLER BEARING for wear, as bearing failure often accelerates sun gear shaft damage. Additionally, verify the condition of the 2095209037: DIFFERENTIAL and 2095309059: DIFF.HOUSING during rebuilds to prevent premature re-failure.

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