I've got an '04 1500 with around 140k on the clock and it recently started making the old familiar power steering whine and was getting difficult to turn on tight, low speed turns. Stepping on the brakes made it worse. So I replaced the PS pump. It seemed to improve everything and the last few month it has felt better but it has slowly starting to make the same whine again, but now when using the brakes and performing tight steering moves it is more pronounced than before the pump replacement. I did use an aftermarket rebuilt PS pump and I do know that you can occasionally get a bad rebuild. However, I'm surprised it would fail within a few months. When it was relaced, I di dnot notice anything unusualy with teh fluid that came out of it. It didn't smell burned, wasn't black, or anything out of the norm. I did try purging the pump and steering box with Sea Foam wondering if I had a sticky valve. New fluid was put in with no apparent change. So my question is, do I have a bad pump again or is there some other component contributing to the problem by placing excessive demand on the PS pump?