My 2nd and AUTO 4wd do work but my 4low and 4hi doesn’t work. I am in neutral when I shift. I hear the actuators move. I see the light indicate it is in gear but I can’t get the front tires to pull when in 4 low or hi. They will pull properly in AUTO 4wd. I have a real steep Mtn road that I like to use 4low on. Please help. I am attaching a video showing the situation.