ZF 2094.309.015 CROWN WHEEL | OEM Genuine Part

Overview

The ZF 2094.309.015 CROWN WHEEL is a critical final-drive component engineered for heavy-duty construction machinery transmissions. This OEM genuine part transfers rotational torque from the differential side gears to the axle shafts, enabling smooth power delivery under extreme loads. Positioned within the planetary gear set of ZF’s modular transmission systems, the crown wheel (also known as a ring gear) meshes directly with the pinion gear to achieve the necessary gear reduction. The SKU 2094.309.015 is precision-machined to OEM tolerances, ensuring minimal backlash and optimal gear contact patterns. When paired with a robust TRANSMISSION HOUSING, this component forms the backbone of the driveline’s torque multiplication stage.

Symptoms of Failure

• Whining or howling noise during acceleration: Worn crown wheel teeth create irregular contact patterns, producing a distinct high-pitched whine that intensifies under load. This “ring gear noise” is a classic indicator of surface fatigue or pitting.
• Vibration through the chassis: As the crown wheel’s tooth profile degrades, it induces cyclic vibrations felt in the operator seat or floorboard, particularly at specific speed ranges.
• Metallic debris in transmission fluid: Flakes or silver particles found during oil changes signal advanced wear of the crown wheel’s hardened surface, often accompanied by a gritty feel in the lubricant.
• Intermittent gear slipping or clunking: Excessive clearance between the crown wheel and pinion allows sudden load shifts, causing a “clunk” when transitioning from drive to coast or during direction changes.

Technical Specifications

Compatibility

This crown wheel is designed for ZF’s WG series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It is a direct fit for the ZF WG180 and WG200 transmission models, as well as select variants of the WG150 and WG210 series. The part integrates with the HOUSING and HOUSING assemblies that enclose the differential unit. For complete rebuilds, the COVER must be properly torqued to maintain bearing preload. Always verify your transmission’s serial number against ZF’s parts catalog before ordering.

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