Flexplate wobble

[dave2953]

I had a broken flexplate in my truck that was making noise and replaced it with one I got from a friend. I installed it and ran the engine before I re-installed the trans. and noticed that the flexplate "wobbled" quite a bit as it was rotating. When you have it laying on a flat surface you can see that the flexplate doesn't lay flush all the way around. I went to the parts house and looked at a new one and it did the same thing. Is this normal? I guess it should have some movement, hence the name, but I don't know how to determine what's excessive. I just don't want to get it all back together and have complications. Sorry for the long post and thanks in advance for your help.