ZF 4699.823.022 GP21 | OEM Genuine Part

Overview

The ZF 4699.823.022 GP21 is a precision-engineered genuine OEM part designed for the clutch pack assembly within heavy-duty ZF transmissions. This component, identified by the SKU 4699.823.022, functions as a critical pressure plate or separator plate, ensuring consistent hydraulic clamping force during gear shifts. Located within the transmission’s rotating clutch drum, it works in direct conjunction with the 4699100019: BASIC PARTS kit to manage torque flow. When paired with the 4699300139: HOUSING, it forms a sealed unit that prevents fluid bypass and maintains system pressure. This part is essential for smooth power delivery in construction machinery, reducing thermal stress on adjacent components like the 4699300156: GEAR SHAFT.

Symptoms of Failure

When the ZF 4699.823.022 GP21 wears out, operators will notice distinct performance issues. Look for these specific failure symptoms:

• Erratic gear engagement or delayed shifting – Worn plates cause inconsistent hydraulic pressure, leading to hesitation when shifting from forward to reverse.
• Internal transmission oil leaks – Degraded sealing surfaces allow ATF to bypass the clutch pack, visible as puddles under the bell housing.
• Torque converter shudder under load – A vibrating sensation during acceleration indicates the GP21 cannot maintain proper friction clamping.
• Burning smell from transmission fluid – Overheated oil results from excessive slippage when the plate fails to engage fully.

Technical Specifications

Compatibility

This GP21 plate is engineered for ZF power shift transmissions commonly used in wheel loaders and excavators. It is a direct fit for the following ZF models:

• ZF WG180 (all variants)
• ZF WG200 (series 2 and 3)
• ZF 4WG-200
• ZF 6WG-260

Always verify the stack height using the 4699300127: PLANET CARRIER as a reference point during installation. The GP21 must be replaced in sets with the corresponding friction discs to avoid uneven wear.

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