ZF 0501.328.347 CUP SPRING for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 0501.328.347 CUP SPRING is a precision-engineered component designed for the WG100, WG130, and WG131 transmission series. This OEM genuine part functions as a critical load-bearing and damping element within the clutch or planetary gear assembly, ensuring consistent preload and vibration absorption during gear shifts. The SKU 0501.328.347 is manufactured to exact ZF tolerances, maintaining axial tension between mating surfaces to prevent premature wear. When paired with the 2095109020 DIFFERENTIAL, this cup spring helps stabilize torque distribution across the drivetrain.

Symptoms of Failure

• Erratic gear engagement or delayed shifting: A worn cup spring loses its preload capacity, causing hesitation when transitioning between forward and reverse gears in WG100 transmissions.
• Low-frequency drivetrain vibration: Degraded spring tension allows axial play, resulting in a humming or grinding noise during acceleration—often misdiagnosed as bearing failure.
• Oil contamination from metal debris: Fatigue fractures in the cup spring generate fine metallic particles that circulate through the hydraulic system, accelerating wear on the 0750117075 TAPER ROLLER BEARING.
• Intermittent power loss under load: When the spring collapses, the clutch pack cannot maintain full clamping force, leading to momentary slippage during hill climbs or heavy hauling.

Technical Specifications

Compatibility

This cup spring is engineered for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models used in medium-duty trucks and construction equipment. It also fits select WG180 and WG200 variants where the clutch pack uses a 48.5 mm spring pocket. For differential-side applications, verify compatibility with the 2095209037 DIFFERENTIAL and 2095309059 DIFF.HOUSING assemblies. Always cross-reference your transmission serial number before installation.

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