ZF 2095.104.015 MAIN SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2095.104.015 MAIN SHAFT is a critical rotating component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transmits torque from the input shaft to the gear cluster, ensuring synchronized power delivery within the transmission housing. As the central axis for gear rotation, the main shaft must withstand high torsional loads and maintain precise alignment. The SKU 2095.104.015 is precision-machined from forged alloy steel to meet ZF’s original factory tolerances, making it essential for any rebuild or overhaul of these heavy-duty transmissions. When replacing this shaft, it is common practice to also inspect the 2095109020: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING for wear, as these components share the same load path.

Symptoms of Failure

• Gear engagement noise during acceleration: A worn main shaft often produces a distinct whining or grinding sound when shifting under load, particularly in second and third gears.
• Vibration in the driveline at highway speeds: As the shaft loses its surface hardness or develops runout, you will feel a rhythmic shudder through the chassis, often misdiagnosed as a wheel balance issue.
• Oil contamination with metallic particles: Flaking or spalling on the shaft’s splines or bearing journals introduces fine steel debris into the transmission fluid, visible during routine oil changes.
• Intermittent gear slipping or jumping out of gear: Excessive axial play caused by a worn main shaft allows the gear cluster to shift position, leading to sudden loss of torque transfer.

Technical Specifications

Compatibility

This main shaft is specifically designed for ZF’s WG-series mechanical transmissions. It is a direct fit for the WG100, WG130, and WG131 models. While the shaft shares the same spline profile as the WG180 and WG200 series, those transmissions use a longer shaft variant. Always verify the number of splines and overall length against your existing part. For a complete rebuild, we recommend pairing this shaft with a new 2095209037: DIFFERENTIAL and a 2095309059: DIFF.HOUSING to ensure proper gear mesh alignment.

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