2008 mountaineer
 

my 2008 mountaineer is making whistling and groaning sounds, seems to be coming from back of car and happens while driving and when stopped. has anyone else had this problem.

sounds like an open rear window (just barely) or the muffler has something clogging it up some.

oh yeah... if it's still under 36K miles on it, take it to the dealer, it's covered under warranty.