I've done some searching and have not much luck finding a thread for what I'm seeing on my cherokee.

Part time doesn't work when I shift into 4wd, the transfer case does give power to both drive shafts and the fluid is full, also have vacuum to the actuator on the front and the shift fork does move. I've checked everything i can think of on the front end except pull the cover on the front differential.

I live in maine so I'm going to need 4wd soon, is there something that I might be missing other then the possibility of bad gears in the differential? I've never done any diff. work before and I've been told they can be a pain..

 

not to be a smarta*$ but how do you know its not working? it will give a better idea of whats going on

 

i thought mine didnt work either when i first bought it, but I made up a little way to figure it out. I got two wheel ramps (the kind you drive right on to work under the car) backed up my rear wheels up to them and held them in place, put some vegetable oil on the back wheels and tried to back into them. of course they were slipping so i pulled the handle back and sure enough...4wd was working fine lol

Drink a couple beer with your buddies and try this haha it worked for me

 

sorry thats some info I should have put in, with the jeep in 4wd up on 4 jack stands i get no power from the front just the back

 

LOL! I may try this just for the lleh of it!

Can you tell get bored easy? Hahahaa!

 

ohhh yeah id say theres a problem does the front diff make any noise at all?

 

not a sound, I had the front shaft out yesterday to replace a u joint and I spun the yoke on the diff. and it felt like it wasn't connected to anything inside

 

Uh oh.... Was there ANY resistance when you spun it? Did it just spin free?

 

yeah id pull the cover then it sounds bad though lol itd be interesting to know what you find though so keep us updated

 

very little, what felt like just fluid it didn't feel like it was pushing another gear....

 

"have vacuum to the actuator on the front and the shift fork does move"

Can you move the shift fork any farther by hand?

 

Yeah, as stated. You really need to pull the cover and see whats going on in that front end, if anything at all. Hate to assume but if there was NO retention... Not good. You may be missing some parts.

Please keep us posted when/ if diff cover is pulled.

 

ok I'll get under it as soon as it stops raining and pull the cover, I'll take a few pics while i'm under it just to be safe.

whats the easiest way to go replace the gears or the full axle? and would it be a dana 30 in a 1990?

 

I get full movement by hand, it moves easy

 

definately a dana 30, and if your going to replace it, you may as well swap in a complete non disco front end