Quoting dsm93:
The passenger side linkage is messed up. You can't tighten it which causes the arm to hit the hood. Anyone had this problem and if so, HOW DO I FIX IT!!!???
Thanks
One of two things has happened: You stripped the splines off the drive stud, or you had a loose wiper arm and now the splines on the stud have carved out too big a taper in the wiper arm. Check the stud. If the splines are ok, you need to replace the wiper arm.