trouble shoot it a bit...
while driving and you hear the whine...will it go away if you slip it into neutral? yes means possible tranny moving parts, no means engine accessories whine.
if you are driving and you hear the whine, slip into neutral and turn the jeep off, still whine?
yes then is it sounding like a wheel/drivetrain issue, no then it is in the engine area.
find a time when it does whine and stops when you change a varible (tranny out of gear, engine off, wheels not moving, wheels moving/engine off)
helps pin point alot closer...i chased a noise and found it to be a engine item after doing the following