ZF 4699.003.054 GK20 II | OEM Genuine Part

Overview

The ZF 4699.003.054 GK20 II is a genuine OEM shift mechanism component engineered for heavy-duty construction machinery transmissions. This precision-machined part sits within the upper valve body assembly of ZF power shift transmissions, directly controlling hydraulic flow to the clutch packs. As a critical interface between the electronic control unit and the mechanical gear train, the SKU 4699.003.054 ensures precise engagement and disengagement of gears under extreme load conditions. It works in concert with the 4699101109 HOUSING and the 4699301192 HOUSING to maintain proper alignment and sealing within the transmission casing.

Symptoms of Failure

• Delayed or harsh shifting under load: When the 4699.003.054 wears, hydraulic pressure drops, causing noticeable hesitation between gear changes during excavation or grading operations.
• Intermittent transmission slippage in forward gears: A worn GK20 II component leads to inconsistent clutch pack pressure, resulting in power loss when climbing slopes or pushing heavy material.
• External oil seepage near the valve body cover: Deterioration of sealing surfaces on this part allows ATF to weep past the 4699301017 BEARING COVER, leaving visible drips on the transmission housing.
• Erratic neutral-to-drive engagement: Operators may experience a sudden “clunk” or momentary loss of drive power as the shift mechanism fails to maintain consistent hydraulic lock-up.

Technical Specifications

Compatibility

This genuine ZF 4699.003.054 GK20 II is designed for use in the following ZF transmission models commonly found in wheel loaders, dozers, and excavators: WG180, WG200, WG210, and WG250 series. It also fits select 4WG-200 and 6WG-250 variants. Always verify the 4699301085 COVER compatibility with your specific transmission serial number before installation.

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