ZF 0730.105.978 WASHER for WG100 | OEM Genuine Part

Overview

The ZF 0730.105.978 WASHER is a precision-engineered OEM genuine component designed specifically for the WG 100 series transmission. This hardened steel washer functions as a critical load-spreading and sealing interface within the planetary gearset assembly, ensuring proper axial clearance and preventing metal-on-metal contact between rotating and stationary components. As an integral part of the transmission’s hydraulic circuit, the 0730.105.978 washer works in conjunction with the TRANSMISSION HOUSING and the HOUSING to maintain precise tolerances under high torque loads. This SKU 0730.105.978 is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life in WG100 applications.

Symptoms of Failure

• Hydraulic fluid seepage at the housing joint: A worn 0730.105.978 washer can cause oil weeping between the HOUSING and the main casing, leading to gradual fluid loss and potential overheating.
• Abnormal gear engagement noise: When the washer loses its original thickness, axial play increases, producing a distinct clunking or grinding sound during gear shifts under load.
• Intermittent clutch pack slip: Insufficient washer height alters clutch pack clearance, causing delayed engagement or momentary power loss during acceleration.
• Metal debris in transmission fluid: A fractured washer releases steel particles into the oil circuit, often detected during routine filter inspections or oil analysis.

Technical Specifications

Compatibility

This washer is engineered for the ZF WG100 series transmissions, including models WG100, WG120, and WG150. It is also compatible with certain WG180 and WG200 variants that share the same planetary carrier architecture. The 0730.105.978 washer is typically replaced during overhaul alongside the O-RING and other sealing elements to ensure complete hydraulic integrity. For WG200 applications, always verify the stack height against the service manual specifications.

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