Wheel bearings are a replacement service item that will be needed sooner if you are tracking your car frequently. I have been able to inject grease into the lower ball joints with an injection needle on a grease gun. But, it was a bit of work to get the ball stud popped out of the knuckle assembly so I could slip the needle in next to the stud, inject some grease and then put it back together. My impression is that Ford was rather stingy with the amount of lube they applied at the factory.