strange noise from tranny?

[tr_racing]

Hi, huy i'm new here. I'm from Quebec, Canada. I just bought a 05 sedan 6mt with 91000km. I don't know the past maintenance so I don't took chance & i change the tranny fluid. First time I put Castrol Syntec 75w90 GL5. After the shifting was harder than before & at 3000rpm & more, I start hearing a sound like the wind from the middle of the car. I did some search here I read that a lot a people have these problem. I switch for the Amsoil 75w90 GL4 & still hear the sound from the tranny & still harder than the first one but smoother than the Castrol.

Also when we remove the Castrol, the oil have a strange color.... like the oil have air in?????

Does I have to put oem oil or I have another problem???

Thanks in advance

Kevin..

[getyourgwapupp]

If its an 05, i believe u should still be covered under manufacture warranty!

[tr_racing]

The noise is only at cold??? & disapear when I put tranny on neutral?? Do you recommand me to flush it again since I put GL5 in??? Put oem on?

Thanks

Kevin..