ZF 4699.801.100 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.100 GK10 is a critical OEM genuine gearset assembly designed for heavy-duty construction machinery transmissions. This part, identified by SKU 4699.801.100, functions as the primary reduction gearset within the transmission housing, directly managing torque transfer from the input shaft to the output drive. It sits at the heart of the gear train, ensuring smooth power delivery under extreme loads. When installed, it works in tandem with the 4699101081 HOUSING to maintain precise alignment and structural integrity. The GK10 designation indicates a specific gear ratio optimized for low-speed, high-torque applications common in excavators and wheel loaders.

Symptoms of Failure

When the ZF 4699.801.100 wears out, operators will notice distinct performance degradation. Look for these specific failure indicators:

• Whining or grinding noise during gear engagement – A high-pitched sound from the transmission center section, especially under load, signals gear tooth wear or pitting on the GK10 assembly.
• Intermittent gear slipping under heavy load – The transmission may momentarily lose power transfer when climbing grades or digging, indicating worn gear meshing surfaces.
• Metal particles in transmission oil – Visible metallic debris on the drain plug or in the oil filter indicates advanced gear degradation requiring immediate replacement.
• Vibration through the chassis at specific RPM ranges – Unbalanced gear sets cause harmonic vibrations that worsen as the 0634306309 O-RING seals degrade, allowing contamination ingress.

Technical Specifications

Compatibility

This 4699.801.100 gearset is engineered for ZF’s WG series powershift transmissions commonly used in construction machinery. It is a direct fit for the following transmission models:

• ZF WG180 – 6-speed powershift for wheel loaders
• ZF WG200 – Heavy-duty variant for excavators
• ZF WG120 – Compact version for backhoe loaders
• ZF WG150 – Mid-range model for telescopic handlers

During installation, ensure the 0501329881 HOUSING COVER is properly torqued to prevent oil leaks, and replace the 0637885612 BREATHER to maintain pressure equalization. The GK10 assembly interfaces directly with the 4699102083 INPUT shaft for correct gear alignment.

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