ok, i have a 1994 ford ranger stepside four wheel drive. My problem is that when i bought it the electronic four wheel drive does not work. I looked under the truck at the transfer case and there was a socket on it. I turned it and it made a click. It went into four wheel drive. The problem is, is that when i run it in four wheel drive it does not want to go back into two wheel drive. It will spring back into four wheel drive until it cools down or something. What could be the problem?

If its electronic, chances are, you have bad sensor.