Is there anything other than the slack that makes you think that it's the UBJ?
I checked all the other components and the UBJ was the only place there was movement.
Have you had an alignment?
Yes, about 15k ago.
Is the tire and wheel combo balanced?
Yes, the day I pulled the wheel to check everything.
Does the boot on the UBJ look damaged?
Didn't really notice, will take a closer look.
Have you compared the other side of the car to see if it has the same movement?
No, but I will. The vibration is on the right so I only checked the right.
The ball joint will have some slack normally
Understood, but this is A LOT of sloppy slack.
use a ball joint press to press out the old one and press in a new one
It appears to me that the (#4) ball joint will bolt to the (#3) control arm?