rear end noise

[neadaporsh]

when coasting to a stop, (2000 996 ) in or out of gear i get a distinctive noise from rear that slows or speeds up as wheel speed changes.....it's not a very mechanical sound, rather like a flat spotted tire or something......I can't hear it when going above 20 miles an hour, probably due to increased wheel speed and engine noise...any ideas would be helpful

[smadsen]

Check the fluid level.

Find a parking lot, drive both directions in a circle, coasting, see if you can isolate noise one side or the other. That might indicate a wheel bearing. Use the brakes/e-brake on and off when coasting. Might also be a brake issue

[BYprodriver]

If the tread is causing the noise you should be able to feel the tread flaw with your hand.