2003 Honda Pilot CV Joint

When accelerating, even slightly, with the wheels turned there is a grinding sound coming from the right front - the sound goes away as soon as you take your foot off the accelerator (even with the car still moving) or when you strighten the car out. The grinding sound is most pronounced when making a sharp turn pulling out of the garage. I've had the dealer and several shops address this problem with no results. I'm inclinded to think its a CV joint issue but there is no indication of a tear in the boot and its not a clicking or popping sound.