ZF 2049.309.090 SHIM | OEM Genuine Part

Overview

The ZF 2049.309.090 SHIM is a precision-engineered OEM genuine part designed to establish exact axial clearances and preload settings within ZF heavy-duty transmission assemblies. This thin, hardened steel shim sits between the transmission housing and bearing races, compensating for manufacturing tolerances to ensure optimal gear mesh and shaft alignment. The SKU 2049.309.090 is critical for maintaining the structural integrity of the gear train, preventing unwanted movement that leads to premature wear. When installed alongside a TRANSMISSION HOUSING, this shim guarantees that rotating components remain securely positioned under high torque loads.

Symptoms of Failure

When the ZF 2049.309.090 shim wears or becomes deformed, specific failure modes emerge that affect drivability and component longevity. Excessive axial play in the main shaft is a primary indicator, often felt as a clunking sensation during gear engagement. Oil leaks at the housing interface can occur if shim compression alters the sealing surface alignment, particularly near the HOUSING joint. Gear slipping under load becomes noticeable as the shim loses its ability to maintain proper bearing preload, allowing shafts to shift. Abnormal whining or grinding noises from the transmission center section often signal that the shim has collapsed, causing metal-on-metal contact between gears and the HOUSING.

Technical Specifications

Compatibility

This shim is engineered for ZF powershift transmissions commonly found in construction machinery, including wheel loaders, graders, and telehandlers. It is a direct fit for the ZF WG180 and WG200 series transmissions, as well as the 4WG-200 and 4WG-210 variants. The 2049.309.090 shim also applies to select ZF Ergopower and Ecomix drivelines where axial adjustment of the input shaft is required. Always verify stack height when replacing this shim alongside a COVER assembly to maintain factory tolerances.

Related Components

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