Ya, been beggin Kevin to help me with a trans tune, well maybe not beggin. But at least I've hinted around a bit. I don't have 35's, but my tires measure 33 and are right at 12" wide. Larry and his son can vouch for the 2wd spinning and his son can vouch for the 4wd spinning and Larry to a point. I really don't think it's the tune, I think it was installation error for the C-1's, has to be. I'm just gonna buy some more and give it another shot, I'm just gonna be certain the installation is correct to a " T ".