"Ulysses" <therealulysses@yahoo.com> wrote in message
news:11kqf04ht93u84c@corp.supernews.com...
>
> "John_regizfan" <john.nafziger@insightbb.com> wrote in message
> news:485f19f8428f8434d4ccddd3c14418cb@localhost.talkaboutautos.com...
> > I have a 91 Ford Explorer, the 4-wheel drive won't engage. I have check
> the
> > shift control module. It checks out. I put a new switch in the dash. Now
> > I'm not sure where to look. Any ideas?
> >
> The most common problem is the servo motor on the transfer case. Usually
if
> you take it apart and clean it thoroughly and lube the gears (I got great
> results with vaseline) it works great. Make alignment marks before
> disassembling. Do not remove the screws that hold on the plastic adjuster
> (not sure what it's called but it has alignment marks on it). The brush
> wires fit into little slots to facilitate reassembly. The brown(?) wire
> that goes to the transfer case supposedly disconnects but I couldn't see
how
> so I cut it and spliced it and soldered it and taped it.
>
> You might want to save this web site under "Favorites"
>
> http://draco.acs.uci.edu/explorer/
>
> Some good info but a few things I do differently...
>
> Info of fixing the servo motor is under "Transfer Case"
>
> I think they tend to overcomplicate things a bit but it's pretty thorough.
>
>
Well, I just reread all the stuff on that site about fixing the transfer
case servo motor and yea, they really overcomplicate it. You do NOT need to
remove the damper or drain the transfer case in order to remove the servo
motor. If I remember correctly there are three (maybe four) 10mm screws,
one sensor that pulls straight out, one wire connector to disconnect, and
then the brown wire which is mentioned many times on the site. My
experience with my '91 and '92 Explorers is that the motor was actually fine
but the gears inside the servo motor housing were stuck and that was the
real problem. Of course now would be a good time to check the fluid level
and change it if it needs it
It gets Mercon automatic trans fluid. The
fill/check plug is up around the sensor that I mentioned. To drain the
transfer case you DO have to remove the damper to get to the plug. I read
that some do not have dampers so maybe those are for the manual trans
models.
