Quote Originally Posted by Sabrewings View Post
It's not JB welding it on. There are parts where two sections are touching but it isn't welded there (but welded elsewhere). These two sections rubbing ever so slightly when the whole subframe flexes (as it must do or it will break, remember this is aluminum) is what causes the noises. Filling the area in between isn't about adding rigidity or strength, it's about adding a cushion material so the metal isn't rubbing anymore.

My only quarrel with the aluminum cradle that the one on my Impala developed a huge crack in the front passenger side.

To the OP, if the car is still under warranty maybe I can find the TSB # and you can give it to the dealer to get them to perform the procedure. If you're out of warranty I can still give it to you but the cost is on you.
I know man. I'm just giving you a hard time. I just think it's strange that something like this would happen on a car that's only 3 years old. That is something that should be under warranty though, if it still is under warranty of course. Hope everything works out though.