[Fogey]

Getting a sort of clunking sound toward the rear of my car, when I go over a bumb or make a sharp turn, (particluary if turning uphill). I suspect it is some suspension issue. I have had Pfadt swaybars installed. Is it even worth going to the dealer or will just tell me it's not covered because of the swaybars? Sort of a stupid question I guess but just want to save myself a trip to the dealer if he's not going to fix it under warranty.
Car's a 2011, still inder bumper to bumper.