post #1 of Old 05-11-2012, 05:11 PM Thread Starter
Sloater95
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94 wrangler 4x4 problem

I have a 94 Jeep wrangler and as i got stuck, my 4wd wouldnt work. Its got the vacuum lock system. What could my problems be?

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post #2 of Old 05-11-2012, 05:19 PM
mrmark
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probably the vacuum actuator, mine is bad again so I am in the process of removing in and going to a 1 piece from an XJ

Wave as you pass me :D

The problems of owning 2 Jeeps ... I never know which one to work on or which YJ gets the next mod ...
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post #3 of Old 05-11-2012, 08:32 PM
janders82
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x2 on the actuator.

also, check the vacuum swith on the transfer case to make sure the vacuum lines are hooked up. Maybe even follow the lines to see if they are cracked.
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post #4 of Old 05-11-2012, 09:36 PM
dancytron
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Jack up the front right tire. Put in Neutral. Put transfer case in 2wd. Start the engine. You should be able to spin the front tire and front driveshaft will not spin. Put in 4wd and repeat. Either it won't spin or it will spin and the front drive shaft will spin I don't remember but it will obviously be different if it is working.

If that doesn't work, then unplug the vacuum lines and switch the 4wd back and forth and feel for vacuum switching back and forth in the lines. If you don't, either the lines or the switch on the transfer case is bad.

If that doesn't work, then get some hose and hook straight to manifold vacuum and try switching it back and forth between the two ports on the vacuum motor and see if you can get it to lock and unlock. Or you could use a vacuum pump if you got a good one of those. If that doesn't work, the vacuum motor is bad or the fork is messed up somehow. Take the vacuum motor off and look at it and test it with the vacuum hose.
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post #5 of Old 05-11-2012, 10:09 PM
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Quick fix


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post #6 of Old 05-12-2012, 04:47 AM
mrmark
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Quote:
Originally Posted by Anticanman
Quick fix
What is this we are kooking at?

Wave as you pass me :D

The problems of owning 2 Jeeps ... I never know which one to work on or which YJ gets the next mod ...
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post #7 of Old 05-12-2012, 05:30 AM
ReddDawg
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Quote:
Originally Posted by Sloater95 View Post
I have a 94 Jeep wrangler and as i got stuck, my 4wd wouldnt work. Its got the vacuum lock system. What could my problems be?
Did your 4WD light come on? When I got mine the front vacuum lines were jacked up. Didn't take long to fix them. First time I put them on I put them on backwards so my 4WD light was on in 2WD. There is also an electrical connector on the actuator - make sure it's plugged in.

If that's all good check to see if you are getting vacuum there. Then check the t-case. There is an electrical connector and a 4 port vacuum connector going to it.

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post #8 of Old 05-12-2012, 07:59 AM
Anticanman
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Originally Posted by mrmark View Post
What is this we are looking at?
That's how you fix your vacuum actuator in twenty minutes and have a faux solid passenger shaft. Thought you knew about this little trick...

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post #9 of Old 05-12-2012, 08:07 AM
janders82
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Quote:
Originally Posted by Anticanman View Post
That's how you fix your vacuum actuator in twenty minutes and have a faux solid passenger shaft. Thought you knew about this little trick...
does this trick bypass the vacuum? do you have a write up or is it easy to explain? I'd like to try it out
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post #10 of Old 05-12-2012, 08:13 AM
Anticanman
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Someone has a write up from a long time ago. I stumbled upon it on my own trying to get around the vacuum problem. I've written it down so many times I should have started a thread by now.

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post #11 of Old 05-12-2012, 08:19 AM
janders82
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Quote:
Originally Posted by Anticanman View Post
Someone has a write up from a long time ago. I stumbled upon it on my own trying to get around the vacuum problem. I've written it down so many times I should have started a thread by now.
i hear ya...i'll see if i can find it. Thanks
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post #12 of Old 05-12-2012, 08:26 AM
mrmark
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Quote:
Originally Posted by Anticanman View Post
That's how you fix your vacuum actuator in twenty minutes and have a faux solid passenger shaft. Thought you knew about this little trick...
No, but I have the solution to my problem in the mail Plus, the right front seal is leaking as I noticed the other day while trying to get that manual actuator working. So I'll kill 2 birds with one seal ... oh I mean stone...

Wave as you pass me :D

The problems of owning 2 Jeeps ... I never know which one to work on or which YJ gets the next mod ...
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post #13 of Old 05-12-2012, 08:29 AM
Anticanman
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Originally Posted by mrmark View Post
No, but I have the solution to my problem in the mail Plus, the right front seal is leaking as I noticed the other day while trying to get that manual actuator working. So I'll kill 2 birds with one seal ... oh I mean stone...
It may take a while, I didn't spend much on shipping...

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