ZF 4607.302.020 SHIM for WG65 | OEM Genuine Part

Overview

The ZF 4607.302.020 SHIM is a precision-engineered adjustment component designed for the WG 65 series of heavy-duty transmissions. This OEM genuine part is critical for establishing the correct axial clearance between the transmission housing and the planetary gear set. By compensating for manufacturing tolerances, the shim ensures optimal gear mesh and load distribution. The SKU 4607.302.020 is a direct factory replacement, guaranteeing a perfect fit without the need for additional machining. It is typically installed against the TRANSMISSION HOUSING to maintain precise bearing preload.

Symptoms of Failure

When the ZF 4607.302.020 shim wears or is incorrectly installed, several distinct issues arise. Look for these specific failure symptoms to diagnose the problem:

• Excessive axial play in the output shaft: A worn shim allows the shaft to move back and forth, causing a noticeable clunk during gear engagement.
• Low-frequency gear whine under load: Incorrect clearance from a degraded shim leads to uneven tooth contact, producing a humming or whining noise that increases with speed.
• Premature bearing failure and metal debris in oil: As the shim loses thickness, bearing preload drops, allowing rollers to skid and generate metallic particles in the transmission fluid.
• Intermittent gear slipping in higher ranges: Loss of axial control can cause the clutch packs to misalign, resulting in momentary power loss during shifts.

Technical Specifications

Compatibility

This shim is specifically engineered for the WG 65 series of ZF transmissions. It is a direct fit for the following models: WG180, WG200, WG210, WG220, and WG250. The part is used in both on-highway truck and off-highway industrial applications. When installing, always pair the shim with new HEXAGON SCREW fasteners (M10 x 30) and HEXAGON SCREW (M12 x 35) for the housing cover. For the final torque sequence, use the HEXAGON SCREW (M16 x 45) to secure the output flange.

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