ZF 4699.801.137 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.137 GK10 is a genuine OEM gearshift unit designed for integration within the upper valve body assembly of heavy-duty ZF powershift transmissions. This SKU, 4699.801.137, functions as the primary mechanical interface that translates driver input into hydraulic valve actuation, controlling clutch pack engagement for forward and reverse gears. Positioned directly above the main control housing, this GK10 unit ensures precise modulation of oil flow under high torque loads. For proper sealing and structural integrity, this component mounts directly onto the 4699101081: HOUSING and is protected by the 0501329881: HOUSING COVER.

Symptoms of Failure

• Erratic gear engagement or delayed shifting – When the GK10 wears, hydraulic spools stick, causing a noticeable lag when shifting from forward to reverse.
• Internal oil leaks at the housing interface – A worn GK10 can cause fluid bypass, often traced back to a degraded 0634306309: O-RING between the shift unit and the main housing.
• Transmission overheating under load – Incomplete clutch pack engagement due to a failing GK10 generates excessive friction and heat.
• Intermittent neutral or gear drop-out – Mechanical play in the shift fork linkage leads to sudden loss of drive, especially on inclines.

Technical Specifications

Compatibility

This genuine GK10 unit is engineered for ZF WG series powershift transmissions commonly deployed in construction machinery. It is a direct fit for the WG180 and WG200 transmission models, as well as the WG210 series used in wheel loaders and graders. The part also integrates with the 4WG-200 and 6WG-200 variants. For ventilation of the assembly, ensure the 0637885612: BREATHER is clear to prevent pressure buildup. Always verify your transmission serial number against the OEM reference before ordering.

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