ZF 4108.302.180 PLANETARY GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4108.302.180 PLANETARY GEAR is a critical OEM genuine component engineered for the WG100, WG130, and WG131 transmission series. This precision-machined gear set sits within the planetary carrier assembly, where it manages torque distribution and speed reduction during gear shifts. As a core element of the epicyclic gear train, it directly influences shift quality and load-bearing capacity. The SKU 4108.302.180 ensures exact fitment and metallurgical consistency with ZF’s original design specifications, making it essential for maintaining factory-rated performance in heavy-duty commercial applications.

Symptoms of Failure

• Erratic gear engagement or slipping under load: When the planetary gear teeth wear or spall, the transmission may hesitate or fail to hold torque during acceleration, particularly in lower gears.
• Metallic grinding or whining noise from the transmission housing: Worn planetary bearings or chipped gear teeth produce distinct high-pitched sounds that intensify with engine RPM, often audible near the HOUSING (4108101115).
• Contaminated transmission fluid with metallic particles: Debris from a failing planetary gear will appear as silver or bronze flakes in the oil, often detected during routine drain intervals via the DRAIN VALVE (0501313402).
• Intermittent loss of power to the wheels: A cracked planetary carrier can cause sudden torque loss, especially during tight turns or reverse operation, requiring immediate inspection of the BEARING COVER (4108301304) for alignment issues.

Technical Specifications

Compatibility

This planetary gear is specifically validated for the following ZF transmission models: WG100, WG130, and WG131. It may also be suitable for earlier WG180 and WG200 variants when used with the correct HOUSING (4108201277) and updated thrust washers. Always verify the serial number against your transmission’s build sheet, as minor design changes occurred after 2018 production runs. For mixed-model fleets, cross-reference with the POWER TAKE-OFF (4108111051) adapter plate to confirm clearance.

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