Will a zj or wj front axle bolt in to a xj. I need to replace the front because of that stupid vac from the t-case will int work for it.

 

if it's a d30 with the coil spring brackets then yes.
You'ed have to swap the axle shafts if it comes out of a ZJ since they have velocity axles.

 

I hear there is a way to lock that axle. Is that safe to do? I do drive it on the street some times. And how do you do it?

 

It might not be cheap enough, but I had an idea for electric CAD.
Reefer units on semi trailer. Aka Thermoking and Carrier both.
They use a pull type solenoid, it opens the throttle for high speed mode.
They're not cheap but they do last for years.
Convert the vacuum pull to a steel rod and attach it to the CAD internally and the other end to the Solenoid. then wire it to a switch/relay.
You could have 2wd, 4hi, 2low, and 4low that way.

 

Thats goin a little out =of my leauge I think. I'm a rookie. Not sure what that is.

 

why wouldn't you just replace it with a non disco axle from another cherokee?
the zj and wj are both low pinion.

yes you can just slide the collar across the two shafts and lock it in place one of many different ways. no need to replace any axles.

 

it's an open diff right? i have heard of guys taking the shift fork off and flipping it over to permanently lock it in.

 

So would i remove the vacuum can as well? To remove the shift fork i will need to start where? Sorry im a rookie when it comes to jeeps

 

don't remove the vac canister, you need that for your blend doors to your heater (hvac).
just plug the lines that go to the front diff.

 

Ok well my blower for my ac/heater stopped working. So do you thimk its the vac box? If so is it a easy swap to do. Wont be to crazy hard to figure that out? I have alot of experence with bmw's etc but not american. Thankes for your patience and help

 

no, it's probably your blower motor, they're electrical. all the vac does is switches the blend doors from heater to defrost.

but first, check your fuses and relays. does it work on high?

 

Does not work at all

 

if it's not a fuse, it's probably the blower motor. easy enough to replace, it's on the passenger side under the hood halfway down on the firewall. black round thing.