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Old 11-30-2013, 10:40 PM   #1
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Transfer Case Problem

Hello everyone. I have an 88 wrangler with a 4.2 and a 5 speed manual transmission. I did a recent rebuild and finally got it on the road. When I originally purchased the jeep there was no front driveshaft in it. After the rebuild I put the front drive shaft in. I put the shifter in 2hi and began to drive it before I put the cover over where the shifters come up just so I could see what was going on. I noticed when I begin to drive the front driveshaft spins. The front drive shaft spins no matter what position the shifter is in. Except when its in neutral, then nothing will spin front or rear. The front axle does not engage, but I think I have that problem pegged to a vacuum issue (none of the vacuum lines from the transfer case to the front axle were connected) and just havent had time to go fix it.

Do you guys have any ideas what would cause the transfer case to be "stuck" or whatever its doing? Originally I thought it could be a linkage issue but it seems to go into neutral fine which leads me to believe the shifter is fine. It has not been a huge issue so far because I have not taken it off road but naturally Owning my jeep I would like to be able to if I should so desire.

Thanks in advance for all your help.

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Old 11-30-2013, 11:21 PM   #2
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Does it still have the vacuum CAD installed in the front axle???

Maybe the fork is permanently locked in place.

Does the shift linkage need to be adjusted???

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Old 12-01-2013, 08:57 AM   #3
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Yes the CAD is still installed in the front axle. Going off of where the shifter is when I put it in neutral I would say its fine..

How can I tell if the fork is permanently locked in place and is that something that can be undone and would I want to undo that?
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Old 12-01-2013, 04:21 PM   #4
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Take the cover off the CAD backside of the axle passenger side 4 bolts. A little gear oil will come out so be prepared and be careful with the bolts some have broken them off when rusted in.

You should be able to see how the whole thing works and if the fork is in tact. If so you can manually lock and unlock by hand.

If all is good you may have a vacuum problem or the little actuator at the axle is bad.
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Old 12-01-2013, 06:35 PM   #5
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When the jeep is parked and shut off, see if you can turn the front driveshaft by hand. If you cannot, pull your diff cover. You may have a locker or welded diff up there.
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Old 12-01-2013, 06:42 PM   #6
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Drive shaft spins any time your moving, even with the transfer case in 2Hi, but the Front End Does Not Pull?
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Old 12-01-2013, 08:30 PM   #7
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thats correct. anytime I move the front drive shaft spins but the front tires dont pull. Im not so much concerned with the front axle locking in right now because Im fairly certain thats a vacuum problem that I just havent been able to get to the parts store to buy the lines and replace them. My biggest concern is the fact that in 2HI the front drive shaft is spinning. I just feel like that shouldnt be happeining. How do I check the linkage to make sure everything is working fine with that? Do I have to pull the transfer case apart?

Sorry if these questions seem basic...this is my first 4wd vehicle.
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Old 12-02-2013, 12:15 AM   #8
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Have you tried to turn the driveshaft by hand yet?
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Old 12-02-2013, 06:51 AM   #9
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I have not tried that yet but I will this morning.
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Old 12-02-2013, 09:40 AM   #10
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Yeah that sounds like a locker or welded spider gears. Definitely doesn't sound like there is anything wrong with the TC. Any type of locker up there will turn your drive shaft even if you are not in 4wd, unless it is a selectable that is not engaged. That does not mean it is not getting power from the TC. I would lift the front end up and turn the wheels by hand like others have said. If you can tell that parts is fine, but for some reason you still want to check further, pull your front driveshaft and jack the rear off the ground. Then put it in 4x4 and see if the front yoke turns. If all that works then you are fine. I would bet if nothing is broken the front shaft was pulled due to bad vibes at higher speeds.
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Old 12-02-2013, 02:33 PM   #11
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OK so I got under there a little bit ago and tried to turn the drive shaft with the transfer case in 2hi and I couldn't turn it. My wife had to leave for work in it so I couldn't do a lot more digging...I don't believe the front end is getting power because I had the rear drive shaft out a few weeks ago and tried to put it in 4x4 to pull it back into the shop and it wouldnt even try to move. How do I check the linkage to make sure that its really going into 4x4...

Like I said before when I put the shifter into the "neutral" position nothing would happen, the jeep wouldn't move (with the rear drive shaft in), and the front drive shaft would not spin. I thought because of this the linkage was fine but I guess maybe not...I just dont even know..
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Old 12-02-2013, 06:03 PM   #12
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Jack the drivers side tire off the ground. Try to spin the driveline again. If it turns the jacked up tire, you have a welded or locked diff. If it does not turn, you have a problem and need to pop your diff cover and see what's up.
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Old 12-02-2013, 06:07 PM   #13
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Quote:
Originally Posted by Wombat Ranger View Post
Jack the drivers side tire off the ground. Try to spin the driveline again. If it turns the jacked up tire, you have a welded or locked diff. If it does not turn, you have a problem and need to pop your diff cover and see what's up.
X2. You need the front off the ground. And if you do pop that cover make sure to post pics..

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