I posted a few weeks ago that I was getting a groaning noise when turning the steering wheel. This was after a p/s fluid flush by a local shop, never had a problem before. I sucked the fluid out of the reservoir 3 times and replaced with mobil 1 synthetic ATF. It seemed to be getting better, was a little low one morning and I filled it to the top of the lower mark. Since then, it has settled down to groaning about a minute or so after starting cold and then goes away maybe 5 minutes after that. Could this still be air in the lines? I did order a new reservoir, but haven't got it yet.