You're all fine. Remember mine have been in and out then back in.
When the gears are set at the factory, they are probably computer set and perfect. Plus there is all the bushings and shit so you can't hear them. Well they break in and are silent.
Well I took them out, had the 4.10 failure and had Tracey put them back in. There is no possible way to get them set EXACTLY how they were from GM so now they make a bit of noise. Are they going to break,

but unlikely. They just aren't perfect, and never will be.
It's an issue I have. Everyone else is A-OK!