wiper pivot

Yes, the linkage sockets are plastic and break easily after all these years. They're easy to find (even the dealer had them the last time I checked since they are the same ones used in '72-up pickups). The local auto parts store had them to as well as places online. I recommend pulling the whole wiper transmission out as a unit and replacing all of them at the same time. If one broke, there rest are probably not long for this world either. Now, if it's the drive link bushing, some of those are made of unobtainium......mainly the 3 speed and variable speed ones.