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Unread 05-20-2013, 05:57 PM   #1
Roth
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1991 YJ Wrangler 
 
Join Date: May 2013
Location: Dieterich, Il
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Having problems with jeep

Hi guys I'm new here and I got a yj 4.0 straight 6 manual last weekend and it's now having problems.

I got the jeep and it drove and it was missing the rear drI've shaft. The guy needed a spindle housing and new u joint. So it was stuck in 4 wheel drive.

Drove it to my buddies House and replaced brakes and changed oil. Then went to take it for a test drive. Worked fine. Next morning I go out to drive it and it just stops

It turns on and will go into gear and but won't go anywhere. When I put to gear and push gas drive shaft turns
Even tried pushing it and putting tranny back to into gear which didn't work. Won't go into reverse. Bled out clutch liquid hoPing there was just some airO in there but there was none.

You guys got any ideas? The spindle housIng is in the mail to me so this weekend the rear drive shaft will be back and working. Do u think that could be the problem?

Thanks

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Unread 05-20-2013, 06:16 PM   #2
Mark05059
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ok Im confused a little bit. You have no rear drive shaft... but when its in gear the front shaft turns but the jeep goes no where? Is this correct? If it is.. on the passenger side of the front axle there is an axle disconnect that's held with 4 bolts. Remove the bolts and then do this http://www.jeepforum.com/forum/f12/4.../#post14771599
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Unread 05-20-2013, 06:22 PM   #3
idaholtby
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Quote:
Originally Posted by Mark05059 View Post
ok Im confused a little bit. You have no rear drive shaft... but when its in gear the front shaft turns but the jeep goes no where? Is this correct? If it is.. on the passenger side of the front axle there is an axle disconnect that's held with 4 bolts. Remove the bolts and then do this http://www.jeepforum.com/forum/f12/4.../#post14771599
Yeah, count me confused as well. If I had to guess given this limited description, it almost sounds as though that once you installed a rear drive shaft, then no go. If this is the case, the is the gearing the same from front to rear axle? This is just a fart guess given the description though. Please fill us in with more info.
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Unread 05-20-2013, 06:29 PM   #4
Roth
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Quote:
Originally Posted by Mark05059 View Post
ok Im confused a little bit. You have no rear drive shaft... but when its in gear the front shaft turns but the jeep goes no where? Is this correct? If it is.. on the passenger side of the front axle there is an axle disconnect that's held with 4 bolts. Remove the bolts and then do this http://www.jeepforum.com/forum/f12/4.../#post14771599
Correct

I don't really know what you mean by more information. I don't really have any more information I actually don't know to much about it

But I'll try this when I get home thisweekend
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Unread 05-20-2013, 06:35 PM   #5
haroldpo
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If you do not have a SYE kit on the transfer case and your rear drive shaft just slips in, then all the fluid has ran out and the pump in the np231 transfer case will not work.
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Unread 05-20-2013, 06:37 PM   #6
pasinbuy
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So to understand. Your rig will not go into reverse? That is it?

Can you push it in neutral back out of the garage and see if you can go into first?

Does it just rev up, if so the transfer case may be in neutral and need to be in 4H.
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Unread 05-20-2013, 06:54 PM   #7
idaholtby
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More info means that we need to know exactly how your rig is currently configured and the problem that this current configuration presents. Your question reads like a time line to where different things where changed and the results are a miss-mash in between. Exactly how is your rig at this very moment and exactly what is the issue related to this?
Rear driveshaft installed or not, front driveshaft only? What do you have installed on the rear output of your transfer case? Slip yoke, SYE??? It may be easy for you to assume for us to know what is going on, but this is not the case. Very small details can make a very big difference. Not clairvoyant am I. (At least not over the internet)
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Unread 05-20-2013, 06:55 PM   #8
Roth
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It wont drive in any gear or reverse. And we did push it to see if it would go into gear and it won't.

As Of right now it is in 4 hi thats where it's stuck at until I get spindle housing and get the rear shaft back in this weekend
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Unread 05-20-2013, 07:05 PM   #9
laybackman
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If the rear DS is absent and this YJ was driving in 4WD but isn't now, make sure your transfer case is still in 4WD high. Next look at the front vacuum setup that slides over the 4WD coupler.
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Unread 05-20-2013, 07:57 PM   #10
Roth
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Yea the last owner ran the vacuum line up to the cab and u have to manual put on the vacuum lines if u want 4wd or 2wd
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Unread 05-22-2013, 08:22 AM   #11
pasinbuy
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Quote:
Originally Posted by laybackman View Post
If the rear DS is absent and this YJ was driving in 4WD but isn't now, make sure your transfer case is still in 4WD high. Next look at the front vacuum setup that slides over the 4WD coupler.
I think you have it. The vacuum setup is not working and the axle slide has not gone over to connect the passenger side axle. So when he tries to move the front drive shaft spins but the tires do not move.
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Unread 05-22-2013, 09:14 AM   #12
laybackman
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Fire your YJ up. Put your TC in neutral, and your tranny in drive. Take a peek under your YJ DO NOT crawl underneath this YJ during this little inspection!

The input shaft of the TC should be moving with the engine running since it is tied to the output shaft of your tranny.

If it isn't the tranny is not sending movement to the TC.

If it is then what are the outputs of the TC doing? We know your rear DS is absent but what is it's output yolk doing on the TC?

If the front DSS is spinning but you are not going anywhere then the front vacuum disconnect is not engaged.
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