everyone asks themselves this question when they are getting into their trucks. I was told it would be too costly, in my opinion it still would. But where I'm at in trucks right now I'd consider it an option. If you have to ask whats involved it would be hard to understand everything just yet and how each component deals with the other. I know if I had two 04+ F-150's, one 2wd and one 4wd with the SAME cab and bed configurations, I could do an identical swap without much trouble including the wiring, interior switchs, and vacuum system/solenoids. I drew up a diagram a while back of the entire vacuum system, which isn't too complicated at all. Without much trouble might be an understatement but I'd definitely be willing to accomplish it once if I felt it was rewarding enough (which gaining 4wd after purchasing a 2wd is).
The only part I would question is if the tcase output shaft/tailshaft housing is the same as the tailshaft housing on the 2wd transmission. I'm pretty certain it is and I feel I'd be ready to do the swap.
If you can part with your truck just get a new one with 4wd and save yourself the hassle unless you're strongly mechanically inclined, which asking this question usually doesn't mean so just yet. Doesn't take long. And I hope I don't come accross as belittling, I am not severely inclined myself, to the contrary I don't talk about things I don't know enough about either.
Last edited by Josiah; 12-23-2007 at 07:13 PM.