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wireless 01-29-2011 12:23 PM

99 wrangler 4x4 wont engage
My 4 wheel high or low wont engage. I was told that it had to do with the vacuum actuator but I cant find anything wrong with it. if it does engage it wont stay engaged and makes a loud bang. It was working when I first got the jeep but now it wont and I donít know what to do. Please help!!

TexasT 01-29-2011 12:56 PM

There is no vacuum actuator on a TJ. It's either the linkage or the Tcase. Have you changed anything since buying it?

Rubicon2 01-29-2011 01:30 PM

Check the linkage from your shift lever to your t-case. Very common problem on TJ's for the linkage to eventually need adjustment.

wireless 01-29-2011 04:29 PM

i havent changed anything but the guy before me put a lift and tires on it. how do i ajust the linkage?

Rubicon2 01-29-2011 04:48 PM

Do a search of the forum for "4wd linkage adjustment." It will bring up a thread with details and pictures. I would copy and paste the link for you but I'm on my phone. Phone doesn't like to copy and paste for me.

FireMedic26 01-29-2011 05:02 PM

I have the same problem, sort of. I can still get in 4H, but not 4L. A friend of mine is a mechanic & he said it's the linkage. I haven't had a chance to look at it yet but when I'm under there, installing my lift, I'm gonna look at it.

TexasT 01-29-2011 05:41 PM

They can be a pain to adjust, especially if a body lift was added or the skid plate was dropped. The linkage attaches to the Tcase and to the body so when they are raised or lowered the change has to be made to the linkage for it to work properly. Find a buddy with a jeep that is working and compare that one to yours. You will probably see the difference pretty easily. Good luck.

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