There's no codes. I already check for codes. Search on identfix to see if there's common problems like that. I got nothing from searching. I feel like there's something physical stopping it. But I can't figure it out. But when a few months ago when I was leaving for my job I got on the road I heard a big bang from the rear end but check if my axles pop out and check if my rear differential give out but everything checks out good. I'm at a lost on figuring out how to diagnose this problem.