ZF 4699.801.103 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.103 GK10 is a precision-engineered gearset assembly designed for heavy-duty construction machinery transmissions. This OEM genuine part, identified by SKU 4699.801.103, functions as the primary power transfer unit within the transmission housing, converting rotational force from the input shaft into controlled torque for the output driveline. It sits directly between the 4699101081 HOUSING and the 0501329881 HOUSING COVER, where it engages with planetary gear sets to manage speed and load distribution. This component is critical for maintaining smooth operation under extreme loads in excavators, wheel loaders, and other off-highway equipment.

Symptoms of Failure

When the ZF 4699.801.103 GK10 wears out, operators may notice distinct performance issues. Gear slipping under load is a common symptom, where the transmission hesitates or loses power during heavy lifting or climbing. Whining or grinding noises from the transmission housing often indicate damaged gear teeth or bearing surfaces within the GK10 assembly. Oil contamination with metallic debris can occur as the gearset degrades, frequently accompanied by leaks around the 0634306309 O-RING seal. Additionally, erratic shifting or delayed engagement may signal that the GK10 is no longer meshing correctly with the input components.

Technical Specifications

Compatibility

This GK10 gearset is engineered for ZF transmissions commonly found in construction machinery. It is directly compatible with the WG180 and WG200 series power shift transmissions, as well as the WG150 and WG250 models used in mid-to-large wheel loaders and dozers. The 4699.801.103 also fits select Ergopower and Ecomat variants that utilize modular gearset designs. For proper sealing, always pair this part with a new 0634306309 O-RING and ensure the 0637885612 BREATHER is clean to prevent pressure buildup.

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