1988 Jeep YJ 4wd fix - Page 2 - JeepForum.com
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post #16 of 19 Old 01-24-2012, 09:26 AM
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1994 YJ Wrangler 
Join Date: Aug 2009
Location: Ripon
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It's not locking in 4wd, it's locking the cad fork over and making the passenger shaft a virtual one piece unit. Posi lock allows you to unlock it with a cable, not a transfer case operated vacuum switch.

Perma lock is the picture I posted. There are some advantages to either method over a Non working CAD unit.

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post #17 of 19 Old 01-24-2012, 09:37 AM
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2002 TJ Wrangler 
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Location: unionville
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Originally Posted by JeepJon15 View Post
I much prefer "alley mechanic'd" to another term people use.

Anyway, thanks a lot. I'm gunna take a took at it before work today to double check which nip it is. If its the indicator switch, i may just plug it or something.

I think Unclewilson was saying. He got is '90 Yj running in december, or got his 4wd working in dec. I dont know what a canle is though? Some clarification Unc'?
ran the rugged ridge cable set up !! got jeep running in dec!! didnt even try the vacumn system on my yj. Have all needed for the set up! all parts are free ! u pay for the shipping if that will help! you can pay for shipping after delivery!
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post #18 of 19 Old 01-24-2012, 10:56 AM
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Originally Posted by JeepJon15 View Post
I have a quick question before i head to work.

Fishnic, i read in your thread, and other's have suggested locking 4wd in 100%. Is this called permi-lock, as apposed to posi-lock? I'm not sure what the diff is. What happens when you lock it in 100%? Does that mean 4wd will always be engaged? I was under the impression 4wd on dry pavement is bad for it. (Not to mention gas mileage)

If everything will hook up as-is, that would be great. I'm just trying to better understand all my options here.

They are referring to a "permanent lock". Which means locking the front axle together. It still only engages into 4x4 when you pull the lever inside. You can do this permanent lock, the only downside is that front axle shaft is not balanced from the factory and you may get a vibration at certain speeds. you also may see people then swapping out the axle shaft with a TJ shaft or getting theirs balanced as a fix to that.

If you take the actuator apart it is a little easier to understand. The vacuum slides a fork left and right. that fork slides over a fitting that has gear teeth in it. the 2 shafts sit next to each other under the actuator. when the fitting slides over to the drivers side, the front axle locks together and becomes one unit moving together.
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post #19 of 19 Old 01-24-2012, 04:28 PM
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1995 YJ Wrangler 
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http://www.jeepforum.com/forum/f12/h...ite-up-595515/ this will help with the understanding of how it works. I did this to mine it took me an hour to so it and I love it because it gives you the option of two low or eBay has a kit for $144 search posi lock good luck
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4wd , fix , four wheel drive , YJ

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