Cost to grease ball joints?

Hello, to your question in the title - I'm pretty certain that the ball joints are not serviceable for adding grease. I believe they are sealed for "life" of the component. The concern you are sharing does not sound like a ball joint lubrication concern anyway -- it could be steering and suspension noise due to loose or worn out components, or even an axle joint making some noise. I agree that "bad coolant" doesn't figure in here either. What you will need is a good physical inspection of the concern by a qualified, skilled technician at a shop near you. They will easily determine what is going on and give you some answers as to what needs to be done to resolve the concern. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops