Ozarks Jeep Thing Club

Public Forums => Technical Forum => Topic started by: drock1970 on 02/10/11 - 07:18PM

Title: 4x4 wont go in
Post by: drock1970 on 02/10/11 - 07:18PM

 :102:i have a 1988 wrangler and i was driving it today and i had to shift in in and out of 4x4 a few times and it did fine.  It will not go in to 4 hi or 4 lo. It drives fine in 2 wheel dr.  The 4x4 light on my dash is on all the time now. mechanically it seems fine (it will shift in and out but wont engage)  What is going on!!!!!!!!!!

Title: Re: 4x4 wont go in
Post by: CRAZY LARRY on 02/10/11 - 07:37PM

sound like a vac. line is off or leaking

Title: Re: 4x4 wont go in
Post by: drock1970 on 02/10/11 - 11:29PM

Thanks, I'll do some investigating on that and let you know if that was it...

Title: Re: 4x4 wont go in
Post by: YJ_Aaron on 02/12/11 - 01:43PM

Check vacuum at the front differential.  Most likely it or the 4 port plug on the top front of your transfercase is the culprit.

Title: Re: 4x4 wont go in
Post by: militarytj on 03/16/11 - 12:42AM

where does the front diff. tube go? mine is just hanging up on the radiator, this jeep is in some bad shape. :deadhorse:

Title: Re: 4x4 wont go in
Post by: drock1970 on 03/16/11 - 10:39AM

It's on the top, if your under the rig, look about where the floor panel for the gear shifts are, it will be just to the front of that directly on top.

Title: Re: 4x4 wont go in
Post by: drock1970 on 03/16/11 - 10:42AM

You should have 4 tubes coming out of that cap looking thing that I pointed out. As far as where the other end goes, spend $20 or so and get you a chiltons manual, just be sure it has the vacuum diagrams in it cuz some don't.

Title: Re: 4x4 wont go in
Post by: militarytj on 03/16/11 - 10:51AM

ya I got a chilton's manual..... but I much rather hear and read from (( experienced )) jeep owners, makes for piece of mind Ha Ha

Title: Re: 4x4 wont go in
Post by: YJ_Aaron on 03/16/11 - 06:21PM

Depends on which tube you are asking about on the front diff.  If you mean the one that comes off the third member it should run up your core support on the D.S. of the radiator and clip on.  That's just the vent tube.

If you are referring to your vacuum that engages your disconnect (on pass side just inboard of leaf spring) it should run to xcase.

Title: Re: 4x4 wont go in
Post by: militarytj on 03/16/11 - 07:04PM

Ya, it's the vent tube...gotta be. Thanks brother. :101: it's just hanging there tho. it's a new radiator in it.