So as the 26 inches of snow fell over the past two days here in Colorado I was anxious to try out my (new to me) Jimmy's four wheel drive. Much to my dismay I have not been able to get it to work. I have the on the fly press button in my 95 4dr., and can hear the hub engage but there is no power going to the front wheels and in turn just creates a dead weight on the front axles. Has anyone else ever encountered this, and if so do you think it's my transfer case vac line? Thanks you guys have helped a lot through the past year.

 

What do you mean "you hear the hub engage"?
You hear a sound from what area?
So you press the button for 4hi and the light for 4 hi goes solid?
If this is the case, and your 4wd is not working, then I suspect that the transfer case is shifting into 4wd but the front axles are not engaging.
When the transfer case is in 4wd, vacuum from the intake goes to vacuum pot at the left rear of the engine, then to the transfer case switch on the top right of the transfer case. From the transfer cse switch to the vacuum actuator under the battery tray. The actuator pulls a cable that goes to the right front axle near the front differential and that engages the front axles.
Sorry for the long explanation. Now we need to figure out where your problem is. When you have the transfer case in 4wd can you turn the front driveshaft by hand? If the answer is no, then it's probably in the vacuum system.
Let us know

 

I know I had an issue with the 4x4 once. I heard an motorized "sucking" sound. Turned out the hose hose had come loose at the reserve ball.

 

I refuse to help anyone who has goten that much snow, that is just soooo unfair lol.

 

I haven't been able to check the front axels yet due to packed snow, but when I do, can I just reach under the truck and twist them without lifting it up? I live at a condo with no garage, and until I have a solid ground using a jack out of the question. You guys have helped out a lot though. Merry X-mas, and happy holidays to all.

 

Funny guy...

No you don't have to lift the truck, just reach under and try to turn the front driveshaft by hand, then let us know and someone who is NOT jeleous of all your snow will reply

 

Ok so I read all the info that is posted on the do-it-yourself page (very helpful) and started digging through my vac lines to see if I missed any on the replacement I did on them in the past. Sure enough the vac lines that go to the accuator under the battery tray had been corroded through. I traced them back to the transfer case, and replaced both them and the other two comming from the t-case and shazam! I had four wheel drive. Thanks again.

 

Guaranteed way to have the snow melt.......fix your 4x4...lol