Nissan Repair: 2006 quest - grinding sound when pressing gas sometimes, driveshafts, belts

Question
I start driving, everything is fine. Then after awhile I press the gas pedal and a grinding sound starts appearing. No shaking or anything like that though.

Answer
Derek,

Grinding when you accelerate is strange.  Could you describe where the noise is coming from and is it a groan?  That could be a shield rubbing on the belts or CV driveshafts.  A grinding could be a defective bearing.  Email me back with more and maybe we can narrow it down.