i have a 99 explorer sport with a 4.0 sohc motor and it has auto 4 wheel/4hi/4lo selevtor knob and im wondering if there is ne way to disengage the auto 4 wheel or get rid if it entirely?

These guys have talked about this subject a few times in their forums. Here's a link to one of the thread. hope it works. http://www.explorerforum.com/forums/showthread.php?t=191159&highlight=auto+4x4+brown+wire

BTW: you can join with limited access for free.

Denis

I think the above thread was for a newer system than what is on your 99 Explorer. This one applies to your year model if you want to try it.

http://www.explorerforum.com/forums/showthread.php?t=149388&highlight=brown+wire

If you want to pay for it, a Ford dealer can change the computer programming.

Are you thinking your truck is AWD?