Hey guys. My rear wiper blade quite moving a couple months ago. Noticed the thread part of the shaft was broken clean off and no where to be found. It looks like it had been gone for a while with the rust and cobweb that had formed in it's place. Anyway, I just put on a replacement from the yard and I've noticed that I'm getting about a 1" smaller sweep on both sides of the wipe. It still returns properly when turned off, but during it's actual wipe is short in both directions. I was lucky enough to find the same year vehicle so I doubt I got the wrong part. Any ideas what might be going on here?