here's my
if you only have one locker, put it in the rear. rearson... the rear won't break as easy. if you were to put it in the front you have the wonders of berfields to deal with. with only the front locked you'll putting a more stress on the front end than if you were locked front and rear. and if you are on a budget you probabley don't want to drop a bunch on longfields or bellfields.
second is daily driving.
my rig is a dd and i have a locker wrong in the rear. I hate driving around town with it. pops, hops, jolts,...
if i could afford a selectable i'd have it in aready.
3rd, steering. i have an fj80 highpinion front electric. love it on the trail, can't steer on the road with it engaged.
that's it.... o' plus i'd rather drop the third out of a rear end over a front axle any day.
