ZF 4108.303.297 PLANETARY GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4108.303.297 PLANETARY GEAR is a critical power-dividing component engineered for the WG100, WG130, and WG131 transmission series. Positioned within the planetary gearset assembly, this OEM genuine part transfers torque from the INPUT SHAFT to the output carrier, enabling smooth ratio changes under heavy loads. Manufactured to ZF’s exacting tolerances, SKU 4108.303.297 ensures precise meshing with sun and ring gears, directly influencing shift quality and driveline efficiency. When paired with a new HOUSING and GASKET, this gear restores factory-spec performance in commercial vehicle transmissions.

Symptoms of Failure

• Erratic gear slipping under load – Worn planetary gear teeth cause intermittent power loss during acceleration, especially in 2nd and 3rd gear ranges.
• Metallic grinding noise from transmission – Damaged gear surfaces produce a distinct whining or grinding sound that intensifies with vehicle speed.
• Contaminated transmission fluid with metal debris – Flakes or silver particles in the oil pan indicate advanced gear wear, often accompanied by a burnt smell.
• Delayed or harsh shifting – Excessive backlash from a failing planetary gear disrupts hydraulic pressure modulation, leading to jarring gear engagements.

Technical Specifications

Compatibility

This planetary gear is designed exclusively for ZF WG-series transmissions with a modular planetary design. Confirmed fitment includes:

• ZF WG100 – All variants (WG100, WG100-1, WG100-2)
• ZF WG130 – Standard and heavy-duty configurations
• ZF WG131 – Overdrive and direct-drive models

It is not compatible with WG180, WG200, or older ZF 4HP/5HP series. Always verify your transmission’s serial number against the TYPE PLATE before ordering.

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