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Old 08-02-2014, 03:39 PM   #1
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Axle nut

Maybe a dumb question but what size is the axle nut on a 91 yj with stock axle. Need to pull it so I can replace the ujoint.

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Old 08-02-2014, 05:12 PM   #2
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I want to say 36 mm...

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Old 08-02-2014, 05:12 PM   #3
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The axle nut is a 36mm. I got the socket from NAPA for $14. 1/2" drive impact socket.

Just so you know, that nut is ON THERE!...lol. Torque setting is supposed to be 175ft. lbs. I bent 3 breaker bars trying to get mine off before resorting to a 3/4" impact wrench. Had to use a steel prybar in the opening for the u-joint to hold the shaft while attempting to loosen the nut.
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Old 08-02-2014, 05:28 PM   #4
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Awesome thanks for the help! I can see it's not gonna be a easy task but don't wanna be left in the mud from a blown ujoint.
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Old 08-03-2014, 10:16 PM   #5
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Now I have one side apart and I see that the diff has water in it. Is there a seal puller to pull the axle seal out? One step forward and two steps back.
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Old 08-04-2014, 12:20 AM   #6
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Is there no seal to keep the water out of the diff?
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Old 08-04-2014, 08:44 AM   #7
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Is there no seal to keep the water out of the diff?
There are outer "seals" and inner seals. The outer seals are a joke. It is just a piece of plastic that most likely might not even be there anymore. Your inner seals are true seals. They keep water out and diff fluid in. With these you remove the axles and even the carrier to replace. The passenger side one you have to open up the vacuum disconnect area and the driver one you have to remove the carrier from the diff to replace. No special tool is needed. Make sure your vent hose is still in place. That can let water in.
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Old 08-05-2014, 11:35 AM   #8
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Thanks for the info. Should I replace the outer seal as well? I didn't think to check the vent so I will do that tonight. I'm gonna pull it all down and clean it up. This weekend will be seal installation time!
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Old 08-05-2014, 02:29 PM   #9
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They do make better outer seals. Not sure if they work with the YJ 2 piece though.
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Old 08-09-2014, 09:35 AM   #10
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Are these any good? Are they worth the 70 bucks or so??
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Old 08-11-2014, 07:52 AM   #11
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These are the outter seals. They are there to keep elements out. These aren't the seals that keep fluid in. You will have to research if they fit over the YJ axles shafts. Since we have the vacuum disconnects.
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Old 08-11-2014, 03:58 PM   #12
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Everything I can find says they will work just fine. I knew they were the outer seals just wanted to know if they would help seal out the dirt and water to save the axle seal
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Old 08-12-2014, 07:31 AM   #13
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Everything I can find says they will work just fine. I knew they were the outer seals just wanted to know if they would help seal out the dirt and water to save the axle seal
If they work please report back with the part number!
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Old 08-13-2014, 11:43 AM   #14
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Will do they should be coming in tomorrow jeep is tore down waiting on them
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Old 08-17-2014, 07:58 PM   #15
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Ok the axle seals do not work unless you have the solid axle shaft upgrade I have put them on the shelf awaiting the day I upgrade the axle shafts.
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Old 08-18-2014, 08:26 AM   #16
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Ok the axle seals do not work unless you have the solid axle shaft upgrade I have put them on the shelf awaiting the day I upgrade the axle shafts.
That is what I read. But was hoping you found the correct part # for the YJ.
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Old 08-20-2014, 08:12 AM   #17
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Guess it gives me an excuse with the ole lady to buy new axle shafts!
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Old 08-20-2014, 01:08 PM   #18
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Guess it gives me an excuse with the ole lady to buy new axle shafts!
If it were only that simple. Buy new axle shafts just because the aftermarket outer axle seal doesn't fit the passenger side axle shaft.

But...

When you get the 1-piece axle for the passenger side, then you have to take out your carrier and install an inner seal in the passenger side, Napa part # 11800. Because where the stock seal is on the 2-piece axles (passenger side of the CAD) isn't a machined area on the 1-piece shaft. And this seal will only work if the axle tube is already machined for it to fit. If not then you need to get a die grinder and make a spot to fit the seal into.( took me about 4hrs. with a die grinder and a caliper to make this happen)

Then, once you have the 1-piece axle in place and put everything back together, you will find out that the stock YJ front driveshaft isn't balanced from the factory, because it is designed to only spin while in 4wd. And the factory figures in 4wd means under 35 MPH. So you fork out another $350 for a new CV front shaft from Tom Woods.

Now you can finally say that you did the 1-piece axle upgrade. Only cost you about $600, but you got rid of the failure prone CAD, and you got the larger 279X u-joints in the axles.
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Old 08-21-2014, 09:24 AM   #19
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Can't you take your shaft and get it balanced rather than buying a new one?
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Old 08-22-2014, 01:24 AM   #20
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I should have know it wouldn't be that simple

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