The date is March 12, 2007. I get a strange sort of metallic noise that seems to be temperature aggravated. It seems to be engine RPM related, but I can't be certain. All winter I heard it, most at AM startup. I don't think it goes away at speed but can't hear it over other engine and road noise. It seems load related. At 25 mph in town it could be aggravated by light throttle pressure and sort of disappears on no load with a matched speed and throttle. I live in Fallon, NV, so it was cold. The last couple of days I have been in Blythe, CA, and it has been very warm - about 90. The noise is gone - almost. First thing in the morning I may, but only may, hear it a little. But basically it is gone. It sounds rotational like a drive line bearing, but that wouldn't be RPM sensitive. As the engine would go through the gears the speed of the noise would decrease. I'm baffled. I tried to look at the flex disc on the torque converter but couldn't see one. I suspected engine bearing but oil pressure is 2 at idle and jumps right up on acceleration. I can't hear the noise when the car is not in gear and the engine is accelerated. Help!