I think the swithc for my auto 4x4 is broken, still have to pull the dash and check but how esay is it to find the part to replace it? If that is even my problem which i think it is cuz banging on the dash sometimes gets it to work.
Not too sure about pulling and replacing the push button switch(s) but I'm sure it's a PITA, given Ford's propensity for designing and installing components in odd fashion (i.e. the infamous tailgate and window motors, the Bronco oil pans et al).
So are you sure it's the switch? Becuase there's a helluva lot of parts in the Shift On The Fly system, starting at the dash, then down to the relay and control module, then the wiring outside to the electric shift motor---it's all pretty over engineered and prone to failure. Here's something that you may want to look at though, an inexpensive way to by-pass all the electrical crap and transform your t-case to simple, manual operation. And it's only $55.00.
Good luck.....
http://theshiftster.com/