My 2003 dodge durango is making a grinding noise in the front left side what is it?

drive the truck in a safe place turn left to right you will here a noise change from the left or the right the weight shift will indicate what side. fluid level should have a bolted plug either in the center of the diff or left or right side of it put pinky in first knuckle bend down if fluid on finger it is ok.

Don't know about this one but some front axles are two piece and have a support bearing between the transmission and wheel

check to see how much pad is on the break pads also remove the rust around the disk as this some times catches on the pads making a scraping noise hope this helps ivan

Check front rotors, calipers and pads.Replace with new

could have been lose lugs
or ABS sencer
or something cought in tire area back of rim or even the wheel well splash gard lose
stock tires will not have this issue but over sized ones might
just some areas to check on

Possibly a wheel bearing. Get the wheel on that side off of the ground safely, and then grab the tire at the 12 and 6 o'clock positions and try to rock it back and forth.

If there is more than just a little movement, you need either ball joints or a wheel bearing.

Could be the wheel bearing or anti roll bar bush.

might check the bearings to see if properly greased

You didn't specify if your vehicle is 2- or 4-wheel drive. If 4 wheel, you may have a failing contstant velocity joint which, when having developed worn spots in the cage can cause the noise you describe.
Typically, turning the wheel back and forth can cause the noise to become less or more loud and often the combination of a specific speed and driving a certain curve radius can cause the noise to nearly disappear or become more pronounced.

sounds like a wheel bearing. if the noise goes away even just a little bit when you turn, then its the wheel bearing