Dorman 926-390 Actuator Vacuum Check Valve - 4WD

The Dorman 926-390 is a one-way vacuum check valve designed specifically for four-wheel drive actuator systems on select Ford and Lincoln vehicles. This vacuum control component ensures proper engagement and disengagement of the 4WD system by maintaining vacuum pressure in one direction while preventing backflow.

Key Features:

• Direct replacement for original equipment on specific Ford and Lincoln models
• One-way check valve design maintains proper vacuum pressure for 4WD engagement
• Engineered to match OEM fit, form, and function
• Durable construction for reliable long-term performance
• Helps restore proper 4WD system operation when original valve fails

This vacuum check valve is a critical component in the 4WD engagement system, preventing vacuum leaks that can cause issues with transferring power to the front axle. Dorman is a trusted manufacturer of automotive replacement parts, offering quality solutions for vehicles no longer covered under warranty.