no 4 wheel drive
 

transfer case works but front wheels wont turn need help

Re: no 4 wheel drive
 

need more info man, what Jeep etc. If it is a vac disconnect axle then likely a bad vac line oe internal in the housing for it.

Re: no 4 wheel drive
 

or hubs not engaging???

Re: no 4 wheel drive
 

its 94 yj vac lines good hocked up at both ends thanks

Re: no 4 wheel drive
 

are the hubs turned on with vacuum only on 94 yj

Re: no 4 wheel drive
 

It does not engage the hubs, the vacuum operates a shift fork and collar on the passenger axle. Make sure it is getting vacuum. If you have vacuum but still no 4wd, then you have an issue with the disconnect. There is a 4x4 Posi-Lok kit, it will get rid of the vacuum disconnect and replace it with a new cable operated piece. Well worth the upgrade. Here is the web page 4x4 Posi-Lok Canada .

Re: no 4 wheel drive
 

if you are keeping that axle the Posi Lok is the best mod you can make to it. Did it in my XJ and had a locker up front, it was great because you could Lock the 4WD you can have 3 wheel drive or 4 wheel drive depending on the engagement of the Posi Lok

Re: no 4 wheel drive
 

If you can find a magazine called "4x4 Garage" the winter issue has an excellent write up on the options that you have with a vacuum disconnected D30. It will answer all your questions.