Originally Posted by Kingr98
...Other than sounding annoying, is there any reason for me to replace it?
If it won't pass emissions testing.
Mine rattled for several years, still passed emissions, and drove the neighborhood dogs crazy.
Had some work done at a local tranny shop, they heard the rattling and thought they had broke it. So they opened it, emptied it, and welded it back together! Had to replace it then.
The rattle noise is really annoying, it happens at low speeds, easy for everyone to pinpoint the source.