wiper repair and coupler fix

If the pivot posts are bound up from wear and rust, new bushing will be only a temporary fix. Here's how the story goes...
Original bushings fail after 30 years or more so those are replaced with the assumption that all is good for another 30+ years. When the new bushings fail prematurely, poor quality bushings is the assumption.
For many years I felt that placing the noisy wiper mechanism inside the cabin was the worst mistake in Chryslers engineering. That's because I had never experienced a brand new example. After completely restoring the wiper mechanism I found that they can operate smooth and quietly, even on dry glass.
Bottom line... replace the bushings and cross your fingers. Maybe it wont rain a lot :)