GH1086

I seem to be getting a whining noise from my trans, it is most noticeable from around 1.5K to 2.5K RPMS and around 50 to 60 MPH. At most other points it isn't there or barely audible. I checked the fluid, it was full, clear, and didn't smell burnt. I also have a couple other problems with the trans too such as a very hard 2-3 shift and some pretty firm downshifts too. Any ideas? And FYI I have a 2004 GTO, completely stock.