Ok the other day I was on my way to work and we had some snow. So I put it 4 wheel and its working fine then I get to some wet roads and I turn it off. Well it stayed in 4 wheel even when it was in 2 wheel mode . I tried stoping and backing up and putting it in'N' and it would not come out . The light was still on and it was in 4 wheel. So when I got to work I turned off the truck then I turned it back on with the knob in the 2 wheel position . Then I heard two loud bangs then it was back in 2 wheel. Then I took it to the dealer and they checked it out and sure enough it worked fine for them. Also when I try to put it in 4 wheel the light just keeps blinking and it takes a few times to get it in. Has this ever happened to any of you guys or is this just my luck????