well i checkd the vacuum on those lines. in 2wd, there is like no vacuum what so ever in either line. and in 4wd, the opposite line is got also very little vacuum, if anything...

so now what does every one propose? i kinda want to get this workin cause i promised my cuz a ride in the mud on my way home so i have to take him out nd im not if i have no 4wd.... lol

 

you got to check the hose from the engine bay to the vacuum switch on the transfer case. Could be a clogged switch too.

 

ok where are those vac lines in the engine bay. i am new to vacuum. i have never done stuff with this so i need help.

wht switch could be bad?

 

There is one plastic line running down the back of the engine that goes to the switch on the transfer case. Or go backwards and follow the 2 at the cad back to the switch, then from there to the engine bay. Passenger side, where all the other ones are. It will T into those. Also you might have a diagram on the rad support.

 

Excellent 4wd info and diagnosis page: http://dodgeram.org/tech/repair/4X4/4x4_engagment.htm

 

well i know that i have a few broken vac lines in the engine bay, like the on that controls the heater switch( like where the blower blows) is broke, i am stuck on permanent defrost.

if it is the same lines, then i will have to get that looked into...

 

Yes they need to be fixed.

 

are they the same area, like if the heater cntrols dont work, i just wont have vac for the 4wd either?

 

Yes, they are all in the same area. And all hooked up together in one way or another. There are T,s and check valves.

 

Just a thought..I had an old Cherokee that had the same problem. Turns out that I had driven it through some mud and water and sucked it through the vacuum lines. Ended up using compressed air and blowing the lines out. If its not a broken vacuum line, try shooting air through the hoses from the t-case to the axle (with them both disconnected of course). This fixed my problem. Good luck