sarceneaux

I have a 09 gtr that while driving and the awd kicks in a tapping sound comes from the right front wheel. It does not do it when you first take off until the awd kicks in then when you slow back down to just rear drive it stops. I can watch on the display as im rolling no sound then as soon as display shows awd theres the noise. I thought it might be cv axle but not i changed it. Please help!!!!
Shannon