ZF 4699.823.081 GP21 | OEM Genuine Part

Overview

The ZF 4699.823.081 GP21 is a critical OEM genuine component engineered for the high-stress environment of construction machinery transmissions. This part functions as a precision-machined guide or bushing element within the clutch pack assembly, ensuring correct alignment and axial play control during gear shifts. Specifically, the SKU 4699.823.081 sits between the rotating drum and the piston housing, managing hydraulic pressure distribution and reducing friction during engagement cycles. Without this component, the transmission cannot maintain the precise clearances required for smooth power transfer under heavy loads.

Symptoms of Failure

When the ZF 4699.823.081 wears out, operators typically notice these specific failure modes:

• Delayed or harsh engagement – The machine hesitates before moving forward or reverse, often accompanied by a noticeable clunk. This is a common search query for “transmission engagement delay construction equipment.”
• Internal hydraulic pressure loss – Worn surfaces cause fluid to bypass the piston, leading to “transmission slipping under load” and reduced digging or lifting power.
• Metallic debris in oil pan – As the part degrades, fine metal particles contaminate the hydraulic fluid, which is frequently searched as “metal shavings in ZF transmission oil.”
• Intermittent neutral creep – The vehicle may drift forward when the transmission is in neutral, a symptom tied to “ZF transmission creeping in neutral fix.”

Technical Specifications

Compatibility

This genuine ZF part is designed for use in the following transmission models commonly found in wheel loaders, graders, and telehandlers:

• ZF WG180
• ZF WG200
• ZF WG211
• ZF 4WG-200
• ZF 6WG-200

It is a direct replacement for the original GP21 bushing and should be installed alongside the 4699100019: BASIC PARTS kit, which includes all necessary seals and snap rings. For complete clutch pack restoration, pairing this bushing with a new 4699300139: HOUSING ensures proper bore alignment. Additionally, the 4699300156: GEAR SHAFT and 4699300127: PLANET CARRIER are frequently replaced in the same overhaul interval to prevent premature wear recurrence.

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