Help With Bus Ball Joints

My front suspension started squeeking suddenly last weekend. Squeeking is not actually what it's doing - it's more like stacato WAILING! It sure is loud. I'm deaf in one ear and can't hear with the other and it's STILL loud! Anyway, it's one side that's noisey and as I said, it seems to have come on rather abruptly. The new ball joints were installed summer before last, so less than two years on 'em. They're sealed. Has anyone had ball joints get noisey? Has anyone drilled and tapped for a grease fitting? I wonder if there's room?