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-   -   How to replace and axle shaft and/or a wheel hub bearing assembly (http://www.jeepforum.com/forum/f140/how-replace-axle-shaft-wheel-hub-bearing-assembly-377533/)

ArloGuthroJeep 02-19-2007 07:15 PM

How to replace and axle shaft and/or a wheel hub bearing assembly
 
After a day of fun you Jeep may look like this:
http://www.jeepforum.com/articles/8/1.JPG

On my Jeep I have aftermarket wheels so I am able to access the main hub nut with the wheel still on.

Start by removing the cotter pin:
http://www.jeepforum.com/articles/8/2.JPG

Then the cap:
http://www.jeepforum.com/articles/8/3.JPG

And behind the cap is a spring (shown on left):
http://www.jeepforum.com/articles/8/4.JPG

Next, use your trusty 36mm socket to break that nut before you take off the wheel:
http://www.jeepforum.com/articles/8/5.JPG

With the nut torqued to 175ft/lbs and rust/dirt seizing up the nut, it isn't a surprise that a cheater bar helps:D In this case it is my old tie rod.
http://www.jeepforum.com/articles/8/6.JPG

Now jack up your axle:
http://www.jeepforum.com/articles/8/7.JPG

And remove the wheel, place it under your sliders if you have them or under your hub in the event your Jeep falls off the jack, it won't crash onto the ground:
http://www.jeepforum.com/articles/8/8.JPG

Next, remove the caliper bracket (2 x 18mm bolts) and hang it from the spring via wire or zip ties:
http://www.jeepforum.com/articles/8/9.JPG

ArloGuthroJeep 02-19-2007 07:15 PM

Next, on the back side of the knuckle there are three bolts. They require a 12pt 13mm socket to remove them and can be stuck on there pretty good as well. The first one is at the top, then the other two are on the lower left and lower right (imagine a triangle):
http://www.jeepforum.com/articles/8/10.JPG
At this point you can remove the hub. In my case the outer axle shaft came out with it since I blew up the joint:
http://www.jeepforum.com/articles/8/11.JPG
This leaves you with steering knuckle, minus the outer axle shaft:
http://www.jeepforum.com/articles/8/12.JPG
Remove the inner axle shaft and replace:
http://www.jeepforum.com/articles/8/13.JPG
When putting everything back together there isn't anything special to do.
  • Torque the 3 12 pt 13mm hub bolts to 75 ft/lbs.
  • Torque the main 36mm hub nut to 175 ft/lbs.
Tricks/suggestions:
  • If you don't have a wheel where you can get easy access to the big hub nut to break it, remove thw wheel, and then have someone apply the brake while you loosen the nut.
  • Some of the ABS cables get in the way, just remove them from the bracketry and push them to the side when getting to the hub bolts.
  • If available, be sure to use PB Blaster on the bolts/nuts if they haven't been removed in a while. Last thing you want to do is snap a bolt!
  • My only other hint to this procedure is that it is easier to get to some of the bolts if you turn the wheel to either side.

ArloGuthroJeep 02-19-2007 07:15 PM

Ok, I installed a new axle shaft today. After Napa shipped in an axle with busted tone rings, I picked up a remanufactured unit for $116 after tax. New units are cheaper then remanufactured units (go figure) but they couldn't get a new one until Thursday and work doesn't like me working from home all the time:D

New axle shaft:
http://www.jeepforum.com/articles/8/14.JPG

Review what we have here to put back on, Cotter pin, castle washer, spring washer, axle-->hub nut, washer, 3 hub nuts, and a socket that doesn't belong in the picture. What is missing? The two bolts holding on the caliper bracket to the knuckle.
http://www.jeepforum.com/articles/8/15.JPG

When you slide in the new axle, make sure the splines are clean (as they go into the diff and we want to keep that fluid clean), and try not to let it touch the inside of the axle tube much since it is dirty in there.
http://www.jeepforum.com/articles/8/16.JPG

Toss on the hub and bolt it back up, remember these three bolts require 75 ft/lbs of torque.
http://www.jeepforum.com/articles/8/17.JPG

Install rotor and brake caliper:
http://www.jeepforum.com/articles/8/18.JPG

Then reinstall the tire and torque hub-->axle nut to 175ft/lbs:
http://www.jeepforum.com/articles/8/19.JPG

fmalgapo 01-31-2009 06:17 PM

Is it really necessary to remove the 36mm nut just to replace the hub/bearing assembly. A little confused since you did more than that.

Marc10 02-04-2009 08:24 PM

Quote:

Originally Posted by fmalgapo (Post 6475941)
Is it really necessary to remove the 36mm nut just to replace the hub/bearing assembly. A little confused since you did more than that.

lol thats what Im thinkin..but good stuff!

02tjsport 03-26-2009 08:23 PM

Quote:

Originally Posted by fmalgapo (Post 6475941)
Is it really necessary to remove the 36mm nut just to replace the hub/bearing assembly. A little confused since you did more than that.

Yes, it is necessary to remove the 36mm nut if you are only changing the unit bearing. The axle is what the nut is bolting onto. The axle sticks through the hub/bearing; The axle is secured to the hub via the 36mm nut.

ZJeepn08 04-25-2009 06:34 AM

Sorry for bringing this back from the dead. But since i'm replacing the hub also do I need to remove the 36mm axle bolt? Or can I get away with leaving it on there?

ntaousakis 04-29-2009 07:16 AM

yes you do!

conrasm 05-08-2009 01:53 AM

If you are replacing the hub and shaft, you still need to take the 36 mm nut off to put on the new shaft unless you get one with the new shaft.

leedavis 11-17-2009 10:39 PM

I'm replacing my wheel hub assembly and thanks to this post I can finally do it myself. Back then, i had to take my truck to the shop just to get it replaced.

leedavis 11-18-2009 12:18 AM

Just replaced it and this post served me well. Thanks again!

sullivanpunk 04-10-2010 11:36 AM

Going to use this write up this afternoon to fix mine. Thanks for the information. much clearer then the haynes manuel.

Spooledbseries 06-18-2010 02:51 PM

Sorry to bring this back from the dead again lol. But I was just checking to make sure there are no surprises when I am taking this apart or putting it back together. Once again JeepForums has always came through when I needed help. On a side note I just picked up a axle today for 48$ plus 12$ core.

tylersjeep 10-09-2010 06:04 PM

YouTube - CV Axle Assembly Install Jeep ZJ Pt.1

VikingR1 12-17-2011 06:23 AM

:2thumbsup: Thanks! Everything went exactly as planned. Great write up!:cheers2:


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