ZF 4660.306.128 SPACER for WG92/WG98 | OEM Genuine Part

Overview

The ZF 4660.306.128 SPACER is a precision-machined component engineered for the WG 92 and WG 98 series transmissions. This OEM genuine part functions as a critical axial positioning element within the transmission housing assembly, ensuring correct clearance between rotating and stationary components. Installed directly against the TRANSMISSION HOUSING, this spacer maintains proper gear alignment and load distribution under high-torque conditions. The SKU 4660.306.128 is manufactured to ZF’s exacting tolerances, guaranteeing a service life that matches the transmission’s overhaul interval.

Symptoms of Failure

• Transmission oil leaks at the housing interface: A worn or deformed spacer can compromise the seal between the HOUSING and adjacent components, allowing ATF to weep externally.
• Gear engagement noise or slipping under load: Incorrect axial play caused by a collapsed spacer leads to misaligned gear meshing, producing a distinct whine or momentary power loss.
• Premature bearing wear: When the spacer fails to maintain proper preload, thrust bearings experience uneven loading, accelerating fatigue and generating metallic debris in the oil pan.
• Hard shifting or delayed engagement: Axial displacement alters clutch pack clearances, resulting in harsh or delayed gear changes during acceleration.

Technical Specifications

Compatibility

This spacer is designed for ZF WG series transmissions, specifically the WG92 and WG98 models. It is also compatible with the WG180, WG200, and WG210 variants when used in conjunction with the correct CYLINDRICAL PIN for alignment. The part fits both on-highway and off-highway applications, including refuse trucks, fire apparatus, and heavy-duty construction vehicles. Always verify the axial stack-up using the SCREW PLUG torque specifications during installation.

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