ZF 4699.808.063 GK16 | OEM Genuine Part

Overview

The ZF 4699.808.063 GK16 is a critical OEM genuine component engineered for the clutch pack assembly within ZF’s heavy-duty powershift transmissions. This part functions as a precision-machined piston or actuation element, directly controlling hydraulic pressure application to the clutch discs. Positioned within the transmission’s valve body and rotating clutch drum, the SKU 4699.808.063 ensures seamless gear engagement under high torque loads. It is commonly found in construction machinery such as wheel loaders, graders, and dump trucks, where it governs the shift quality and power transfer efficiency. When paired with the 4699008054: GK16, this assembly forms the core of the clutch modulation system.

Symptoms of Failure

• Delayed or harsh gear engagement: Worn sealing surfaces on the 4699.808.063 cause hydraulic pressure loss, leading to “clutch slip under load” and jerky shifts.
• Internal transmission oil leaks: Cracks or scoring on the part allow ATF to bypass the piston, resulting in “ZF transmission fluid pooling in bell housing” and low pressure warnings.
• Erratic shifting or gear hunting: Degraded actuation from this component triggers “transmission stuck in neutral” or failure to hold gear on inclines.
• Overheating transmission: Continuous slippage from a faulty GK16 generates excessive friction, causing “powershift transmission overheating” during operation.

Technical Specifications

Compatibility

This OEM genuine part is designed for ZF WG series powershift transmissions, specifically the WG180, WG200, and WG211 models. It is also compatible with the ZF 4WG-200 and 6WG-200 variants used in construction machinery from manufacturers like Caterpillar, Volvo, and Liebherr. The 4699.808.063 interfaces directly with the 4699101181: HOUSING and the 4699102198: INPUT shaft assembly. For output-side applications, it works with the 4699103131: OUTPUT drum. Always verify your transmission serial number before ordering.

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