bwilder10h

I just received my 98 GS400 with 57k on it. The car drives nice and seems to run great but makes a moaning noise that can be heard in and out of the car with the engine running and gets louder as the RPM's go up in and out of gear... even does it when stopped and the engine idling I dont believe it's a belt because it's not a squeak, just wondering if it's a bearing or something. Almost sounds like a power steering moan but the fluid is fine. Does it with the a/c on and off too. Please help!