When I got my rig there were 2 new tires on the back and the front two had about 3/4 left. It made a lot of gear whine when slowing down. I put new tires on the front the next day and it fixed 90% of it. I don't know that it really effected the TOD or not (No TOD lights or anything), but did make a noticeable noise. Just what I noticed.