Making transfer case work

[kyleag89]

Well I am installing a 95 AW4 and transfer case into my 89 MJ. My transfer case has vacuum lines running out of it.. How am I supposed to make the 95 T case work?

[Pete M]

both t-cases run without vacuum. :thumbsup: the vacuum in your old t-case was used to power the CAD in the front axle. You shift the t-case into 4wd, and the vacuum is switched and diverted to the CAD, which engages the funky 2-piece front axle shaft. If you still have a CAD front axle, you can just shim the CAD to be engaged all the time and then everything will work properly. :thumbsup: But make sure you plug the originating vacuum line where it comes out of the engine or you'll have a vacuum leak.

[kyleag89]

Ok I actually helped my father do that on his MJ. Does anyone have a link to a good write up on how to do shim the CAD?

 

Found one.. http://comancheclub.com/forums/viewtopic.php?f=9&t=18415

[CWLONGSHOT]

viewtopic.php?f=2&t=2067&p=18387

[kyleag89]

What kind of gear oil do I use for the D30?

[Geonovast]

You should be able to lock the CAD without losing much, if any, oil.

[Pete M]

but if you do need some, I believe it's just plain ol' 75-90 weight.

[kyleag89]

Thanks guys! I am hoping my swap goes successful... I took the driveshafts off last night and my U joints fell apart.. LOL strange because they didn't make any noise at all. I am just hoping I don't have to swap the TCU into my truck.