ZF 2094.104.012 MAIN SHAFT for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2094.104.012 MAIN SHAFT is a critical rotating component engineered for the WG100, WG130, and WG131 transmission series. As the primary torque-transfer element, this OEM genuine part connects the input drive to the gear cluster, ensuring precise power delivery through the countershaft assembly. The SKU 2094.104.012 is machined from high-tensile alloy steel to withstand continuous torsional loads in heavy-duty commercial vehicles. When installed alongside the 2094009020: T 7336 L, this main shaft forms the core of the gear train, while the 2094101017: TRANSMISSION HOUSING provides the structural enclosure that supports its rotational alignment.

Symptoms of Failure

When the ZF 2094.104.012 main shaft begins to degrade, operators will notice distinct performance issues. Gear slipping under load is the most common symptom, often accompanied by a grinding noise during acceleration. Excessive axial play at the output flange indicates worn splines or bearing journals on the shaft. Oil contamination with metallic debris in the sump signals surface spalling on the shaft’s hardened raceways. Finally, difficulty engaging reverse or high gears suggests torsional fatigue that has altered the shaft’s indexing geometry. These failure modes are frequently linked to a compromised 2094298054: HOUSING or a misaligned 2094301069: HOUSING.

Technical Specifications

Compatibility

This main shaft is specifically designed for ZF’s medium-duty WG-series transmissions. It is a direct fit for WG100, WG130, and WG131 models. While the WG180 and WG200 series use a longer shaft variant, the 2094.104.012 may be cross-referenced for certain WG200 applications with a modified output flange. Always verify the spline count and overall length against your existing shaft before installation. The shaft interfaces directly with the 2094009020: T 7336 L thrust washer and the 2094101017: TRANSMISSION HOUSING to maintain concentricity.

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