Jeep stuck in 4WD. Can someone help??

Both my Cherokees do that,, if you drive around awhile it'll pop out by itself, It is annoying,, It wasn't a linkage problem, you could still feel the detents.. I think its just sticky from lack of use... gear hangs or somesuch.. If the lever flops back and forth,, probably a linkage problem, as StrokerScamp says, .. if lever is still stiff, and moves to 2 wd,, just leave it there and it'll come out.. imho