I’m running the 3.5 with 37s and saw the slightest bit of rubbing on the top of the inner fender. My 37 tuck into the wheel well on articulation and your 40s may rub on the outer edge.
At minimum you may want/need to run without the inner fender liner for slightly more clearance. ^^ Others have noted some rubbing, just wanted to share what I saw with my 3.5 and 37s.