Joshua Michael Jones

I've recently leveled and put on 35' Toyo MT's on my 2010 King ranch. I started hearing a high pitch metal-on-metal noise near the front a few days ago. I took it back to the shop and they said it was PROBABLY the dust plate on the wheel. Now, they are saying the driveshaft is at to much of an angle because of the LEVEL and is grinding. I've seen SO many 6" lifted f150 without this problem. I disagree with them but there is nothing i can do.... Anyone have a different answer?