I have a bunch of play in my passenger side wiper arm. I don't think it's in the linkage. I took off the arm and although it looks a little worn, I 'm not sure if it's bad. Does anyone have a picture of the bottom side where it mounts to the linkage? All I can find online is pictures taken from the top.

 

With the wiper arm removed, what happens when you grab the spindle and try turning it? That'll tell you if the slack is in the linkage.

Never seen that part of a wiper arm wear out. By it's very nature it's a bit sloppy, since there is a few degrees of adjustment between the arm and the spindle.