The 4 wheel drive has quit working on my 1991 Jeep Wrangler and I need suggestions on how to get it working again?
I have a 94 wrangler with the vacuum switch on the transfer. It
shouldn't be any different for your jeep. The vacuum switch cost
about $20 or less. Just get a big socket or wrench to remove and
replace AND BE ABSOLUTELY CERTAIN OF THE VACUUM LINE
ORDER/PLACEMENT. In fact, the way I did this was to use a huge
socket wrench to break the threads loose after marking
corresponding vacuum lines and nipples. If this doesn't do it,
inspect the vacuum lines going to the switch.
If you do the vacuum lines check and all is good check the
shifting fork, mine broke
on me. It cost 5 dollars at a junk yard.