The last few times that I've engaged my 4wd on my '92 Dakota the axle
refuses to disengage.  I try all the tricks -- back up, power on, power
off, etc. and eventually I have to get under the truck and remove the
four bolts holding the disconnect housing cover, pull it out a little
and manually sliding the shift fork & collar over -- disengaging the
axle.  Needless to say, I'd like to find a little easier way to
disengage it.  Is there a history of a particular trouble spot that I
should look at first?  I thought that I would start at the vacuum can.
that is supposed to pull the collar over automatically.  In my book it
is called the "shift motor assembly".  Just to clarify one thing -- my
problems is not with the disengagement of the transfer case but rather,
the front drive axle.  Help