weird noise

HI, I have a trans am 2001. I was wondering i u could help me with this winding noise coming from the back between the axle and the mufflers or some were in that region. When i go faster it gets louder. Even when im slowing down and put my foot on the clutch u can hear it until i come to a complete stop. The trans and engine seem perfect though. So if u can help me find the problem write back please! thank u.

My guess is that it is the differential. These things are infamous on our cars.