When I start the car up when cold; i.e., in the am or late in that day after it has been turned off for hours, the car makes a fairly noticeable low humming noise that appears and then stops after about five minutes. I noticed it seems a little more sluggish during that five or so minutes too. I just changed the fluid/filter which actually didn't look to bad; however, it still makes the noise. I have a vag-com and there are no DTC's detected. It sounds like maybe the torque converter, but I thought I would post something here too. Any ideas?? I would appreciate any suggestions-Thanks guys.