Noise when accelerating

I will assume you checked the brakes and wheel bearings for problems, both front and rear? Wheel bearings can be very noisy but still have no extra play in them. Also, check for a stone or metal between the rotors and the backing plates or calipers.
Even a small one can generate enough noise that it sounds like a grinder up front.

I would start at the bearings, It might still be something in the transmision but replacing a bad wheel bearing is easier and less money. A trick on the bearings, jack up/lift the front end so the wheels are off the ground, grab the spring and then spin the tire. You should be able to feel a bad bearing, even is there is no play if you try rocking the tire.

Check fronts and rears, you would be shocked how sounds travel in a chassis.

Another thing you could try, put the front in the air on stands, put the car in gear and step on the brakes while the tires are spinning, that would load the trans-axle and might help point out if the problem is internal.