My 99 F-350 has recently begun to get a little sloppy in the shift lever department. Sometimes when I put it in park, it does'nt quite seem to get there. It will roll forward or backward depending on the grade and it will make a click sound and almost stop at each click. It's like a pin isn't fully set. It is also a bit sloppy in the other gears. Has been for a while, but the Park thing is what caught my attention. It seems there should be an adjustment on the cable somewhere, but I didn't see anything obvious. Any thoughts?

99 F-350 Lariat V10 4x4 CC LB SRW