There's a few things that can fail in the shifter assembly.
#10 is the ball cup bushing. Ball wears the bushing and it cracks open or crumbles to pieces. It's rubbery plastic.
#3 is a plastic tube that can crack and allow a bunch of play in the shifter if it cracks at the bottom. If it breaks thru entirely the shifter will go completely dead.
#2 is a rubbery plasticky guide sleeve that can make for a sloppy shifter if it comes apart.
#16 is the whole coupler assembly and probably doesn't fail altogether as it's riveted together. This one is the easiest check. Lift up the carpet at the rear of the trans. tunnel and open the access cover. Should know right away if something is wrong in there.
