Okay guys, I need some help, my 4 wheel drive was working then one day I needed it and it wouldn't engage, what it would do was hop back and forth between 2 wheel drive and 4 wheel drive but it won't stay in 4 wheel drive, I put a new front actuator and changed the one on the transfer case and it did the same thing and so I put a new buttons in on the dash and it does the same thing. So what should I look for next? Thank you for your time and help!!!!! Sheila