Determining if you mount is weak is something that requires a trained eye. Once you have seen a few thousand of them over the years it is easy to judge but if you do not have the experience in doing so then it is tough to damn near impossible. All that crap being said, unless the mount is torn through, or you are having other drive line issues like thumping and the like I would not worry about it. Take a look at it yourself and see if it appears to be sagging excessively, again one of those things where experience would really help, or if it is tearing out. If not then do not worry about it.

Mark