Rf600 that was one of my concerns, I know with the 240z (s30) I was able to get a list of all the available z-car differential ratios, what car, and what type of differential (r180 or r200). I haven't seen anything like that for the pathfinder (not yet at least).
The switch in the door jam doesn't have much effect on the light when I push it by hand PathyAndTheJets. The light flickers slightly. As for the differential I'm just talking about the planetary gears inside the pumpkin not necessarily the whole thing. I know the rearend will swap no problem. Sorry for the confusion.