Hi, all. I wish I could describe this better but this has the 4 spd auto so I don't know if noise is tranny, rear end, etc. It's not present all the time but so far it appears when car is up to temp, intermittent, turning doesn't enhance noise, and distance driven doesn't seem to matter. Checked all fluids; good to go. What can I do to narrow down problem? Also, when all wheels up on jack stands, car in drive, rear wheels turn at relatively quick idle speed, front wheels not turning all the time. But while driving, the sound seemed to be coming from somewhere behind driver's seat to back of car. I'm completely bewildered. All help appreciated.