Thanks for your advise, any clue how much something like this will cost to repair? Would something like this be included into a powertrain warranty?

I have an 05 Vibe awd, just recently my wife has told me it is making a loud clanking nosie(similar to metal hitting concrete). I have took the car out and I can hear the noise but it is not very loud but she says it can get loud at times. The noise seems to be coming from the rear of the car. I cra...