Re: 4x4 not working?
First off all welcome on board and please fill your profile...
To check if 4wd is workink raise all the wheels and start the engine, look what happen, they should all turn...
If your front axle is the Dana with the vaccum stuff on the passenger side my bet is that your vaccum line has been sitting to close to the exhaust and has a hole in it...To check it out unplug the one going to the axle, start the engine in 4wd and test if there is any depressurisation in them...If not, you ll have to put new ones, they are coming from the T-case.
Sorry for my english, i am french!!!!