Michael Alexander [Tulsa OK]
durango@alexander.net
If you have manual, yes it's as "simple" as swapping the t-case to another lever-shift full-time case. The computer doesn't care... 4wd lights on the dash might be a bit confused - but wont interfere with operation.
But my question is what problem are you actually having? Part-time 4wd should get better traction that fulltime since the front and rear driveshafts are turning at the same rate... Perhaps you can explain your problem a bit more...