Hi.I just bought an NB.I've noticed that if I don't take second gear past 4k rpm and change it into third gear,the gearbox makes a whirring sound.If I put into the fourth gear ,from third while the whirring sound is happening,the car suddenly has lots of torque with no sound.If I put it into second and then accelerate past 4k rpm,then change into third, there is no noise but not much torque/rpm as well as speed compared to fourth gear.It seems like I'm in a high gear .Also when I'm slowing down as well changing shifting down...I can hear a slight wine as the car engages into second gear.Is there a problem or is all of this normal?Also I have the correct gl4 75w90 fully synthetic gear oil filled up correctly.