My '91 S10 is more of a pain than it's worth, but it is paid for and I am doing all I can to just keep it going until I can afford something more reliable. With that said... I am having an issue with the 4wheel drive. The front end seems to be locked in 4wheel and on occasion (more often than not) the right hub seems to bind up when I make right turns. It will LOUDLY unbind itself eventually but I know its causing damage. My question is two parts: 1) What could be causing this, and 2) What is the cheapest way to correct it?