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Old 07-22-2013, 09:53 AM   #1
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Question 4x4 actuator and vacuum hose help.

Iíve had the Jeep bug for about 5 years now, and I finally got one. A '92 YJ with the 6cyl 5spd. The problem I'm having is when I got it, the previous owner took out the 4X4 vacuum lines because the actuator was no good. So now that I finally got my dream vehicle how do I get the 4x4 back on line so I can play. I really have no clue what I'm doing . Hopefully you Vets can help a newbie out.

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Old 07-22-2013, 09:55 AM   #2
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Keep them out and buy a 4x4 posi lok. Search ebay. They are about $125.

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Old 07-22-2013, 10:03 AM   #3
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is this what im looking for?
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Old 07-22-2013, 10:06 AM   #4
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Exactly. The vacuum disconnect is not the most reliable set up. This takes the guess work out of it.
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Old 07-22-2013, 11:02 AM   #5
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How detailed does it get hooking the posi lock up and how does it work/ what does it do different. Sorry for all the questions but ive only owned 2000 or newer z71's.
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Old 07-22-2013, 12:07 PM   #6
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It is manually actuated. They are easy to install. When you shift your transfer case into 4wd, you then lock it the front axle with the posi lok. The vacuum motor is controlled by a switch on the transfer case. If the vacuum lines or motor fails...no 4wd. Chevy's use a similar system. Older models had an electric actuator that would heat a gas that would engage the axle. They were also prone to fail.
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Old 07-22-2013, 12:11 PM   #7
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Quote:
Originally Posted by halestorm26 View Post
How detailed does it get hooking the posi lock up and how does it work/ what does it do different. Sorry for all the questions but ive only owned 2000 or newer z71's.
Takes a newbie about 3 hours to install it, here it is retail:

Posi-Lok PSL900 - 4x4 Posi-Lok for 84-95 Jeepģ Wrangler YJ, Cherokee XJ & Comanche MJ - Quadratec

Highly recommend if you need a quick reliable fix for your vac system.
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Old 07-23-2013, 09:09 PM   #8
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Doesn't take long just put mine in with the cast iron fork
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Old 07-23-2013, 11:12 PM   #9
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Don't buy the posi lock. I have it and I would much rather just have it locked over all the time. Mine is a daily driver too.
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Old 07-24-2013, 12:14 AM   #10
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Mine is just locked permanently with a bolt holding the fork and collar in place.
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Old 07-24-2013, 03:11 AM   #11
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yeah mine is always locked too with washers. the only thing I notice is the steering is very grabby when turning. as in it almost fights you when trying to steer around a sharp turn but not always and it could be certain roads. it will turn to sharp or not enough and it can be a little tough to take a turn without looking like you are distracted or something.
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Old 07-24-2013, 10:49 AM   #12
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After getting the posi lock, having it fail me, I would much rather always have it locked. I done even unlock the posi lock any more
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Old 07-24-2013, 11:02 AM   #13
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After getting the posi lock, having it fail me, I would much rather always have it locked. I done even unlock the posi lock any more
Is there any long term problems with that? I'm just curious. I know you'd have it shifted into 2wd but having the posilock on will still always engage your front differential and drive shaft correct?
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Old 07-24-2013, 12:18 PM   #14
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Is there any long term problems with that? I'm just curious. I know you'd have it shifted into 2wd but having the posilock on will still always engage your front differential and drive shaft correct?
If you front end is balanced right you can get bad vibrations. But it's unlikely. With the posi lock you make the three piece axle a two piece axle. That you can engage and disengage. When you lock it over with washers, it does the same thing but you can't unlock it unless you take off the CAD/vacuum and shift fork housing.

The only advantage to posi lock is 2 wheel drive low.

And no posi lock does not always engage the front axle/differential. It's only engages when you pull the cable and lock it in.

If the cable doesn't strip and leave you stranded in the damn woods, making you rig it to work right. That's what mine did. And I haven't unlocked it since.

If you want my honest advice, from my experience, the posi lock sucks. Just lock it over with washers. Or if you want it to be nice neat and clean, get the permantly lock CAD I think they are 50$
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Old 07-24-2013, 01:38 PM   #15
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so im taking it that the way to go is to just lock it in, im alil new, what would that entail? and wouldnt that kill your fuel mileage?
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Old 07-24-2013, 02:48 PM   #16
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Cole I think you must have done something wrong when installing your posi lock. You're the only person I've ever heard have problems with it. I like mine a lot, and it works great. But locking it permanently works great too. To each his own.
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Old 07-24-2013, 04:38 PM   #17
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Yeah okay, did something wrong when the damn button comes off the cable. Yeah that's definitely a failure in the installation.
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Old 07-24-2013, 04:39 PM   #18
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so im taking it that the way to go is to just lock it in, im alil new, what would that entail? and wouldnt that kill your fuel mileage?
Putting washer around the fork shaft. No it won't kill fuel mileage.
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Old 07-24-2013, 05:02 PM   #19
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Yeah okay, did something wrong when the damn button comes off the cable. Yeah that's definitely a failure in the installation.
Maybe you curved the cable too tight so you had to pull so hard you yanked the button right off lol.
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Old 07-24-2013, 05:15 PM   #20
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Yeah okay. I've also heard more stories about it failing too
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Old 07-24-2013, 07:55 PM   #21
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So I ran outta gas today and wouldn't you know the only person to stop was a fellow jeep owner. He was a really knowledgeable jeeper, he told me just locking it in its the cheapest and best way, and he could have it knocked out in half an hour, thanks for all the advice. I really do love being in the jeep community.

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