ZF 4699.801.261 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.261 GK10 is a genuine OEM gearset assembly designed for the forward clutch pack in heavy-duty ZF powershift transmissions. This SKU, 4699.801.261, functions as the primary torque transfer hub between the input shaft and the planetary gear set, ensuring smooth engagement under high load in construction machinery. It sits directly within the main transmission housing and interfaces with the HOUSING to maintain precise alignment. Without this GK10 unit, the transmission cannot achieve forward motion in working gears.

Symptoms of Failure

• Delayed forward engagement: When the GK10 gearset wears, operators experience a noticeable lag between shifting into forward and actual movement, especially under load.
• Metallic grinding noise from the bell housing: Worn teeth or bearing surfaces on the 4699.801.261 produce a distinct whine or grind during acceleration, indicating imminent gear train failure.
• Intermittent gear slippage in forward ranges: The transmission may suddenly lose drive in forward gears while reverse remains functional, pointing to clutch pack misalignment caused by a failing GK10.
• Contaminated transmission fluid with bronze particles: Shedding material from the gearset mixes with the oil, visible as glitter in the fluid sample, often accompanied by a burnt odor.

Technical Specifications

Compatibility

This genuine GK10 gearset is engineered for ZF WG series transmissions commonly found in wheel loaders, dozers, and graders. It is a direct fit for the WG180, WG200, and WG210 models. The 4699.801.261 also serves as a replacement in certain 4WG-200 and 6WG-200 variants. Always verify the transmission serial number against the TYPE PLATE before installation. The gearset mounts directly into the HOUSING COVER, which must be sealed with the correct O-RING to prevent pressure loss. Additionally, the BREATHER should be inspected during service to ensure proper venting of the housing.

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