4WD and Hubs - JeepForum.com

LinkBack Thread Tools
post #1 of 4 Old 07-05-2014, 12:17 PM Thread Starter
Registered User
2012 JK Wrangler 
Join Date: Nov 2005
Location: South Dakota
Posts: 142
4WD and Hubs

Hey all,

I'm more than a little embarrassed I have to ask the forum this after having 2 JK's since 2007. But ask I will.

I am diagnosing what I *think* is a bad unit bearing on my 2012 with only about 20,000 miles on it. The symptom is a really bad squeal / squeak that changes speed as the wheel speed changes. It's either the bearing or the front brake dragging. But I am pretty sure it isn't the brake.

Anyhoo, today I jacked up the front so I could spin both front tires. The sound is definitely coming from the passenger front wheel. But I did find that both front wheels were pretty hard to spin. You can spin them, but they won't free-wheel at all. They stop as soon as you let go. Then I noticed that the front drive shaft was spinning when I turned either front wheel.

So my question is, do these not have a normal locking-style hub? Or do they disengage in the transfer case? I guess I'm use to Fords where the hub disengages when you put it in 2H. So I just want to ask you guys if it's normal for the driveshaft to spin with the vehicle in 2H when you spin the front tires.

Thanks in advance. Now I shall go listen to my dealer blame my JCR bumper for a bad unit bearing. haha.


Layth is offline  
Sponsored Links
post #2 of 4 Old 07-05-2014, 12:35 PM
Accidental Obfuscator
jwmbishop's Avatar
2011 JK Wrangler 
Join Date: May 2011
Location: Corsicana, TX
Posts: 6,697
These are continuous - they are always connected to the DriveShaft.

J Wm Bishop EA, ASADE
The wagon should, of course, be as light as possible, but strength should not be sacrificed to lightness, for on any but the regularly traveled roads, the wagon will get many a hard knock...
jwmbishop is offline  
post #3 of 4 Old 07-05-2014, 01:45 PM
Registered User
2012 JK Wrangler 
Join Date: Sep 2011
Location: Lake Havasu City
Posts: 6,054
when the tire was off the ground did you grab it at 6 and 12 or3 and 9 and see if it has movement? should be rather tight. if it has slop then the Unite is bad. You run big tires, lots of offset? That can wear on them bad. Though most people kill the ball joints first. Them unit bearings are rather expensive on a JK. I can see them calling out the tires though as it is directly related to that bearing or ball joints tie rods ect. you never know though. depends on the dealer.

222Doc is offline  
post #4 of 4 Old 07-05-2014, 02:37 PM Thread Starter
Registered User
2012 JK Wrangler 
Join Date: Nov 2005
Location: South Dakota
Posts: 142
Thanks guys.

Doc, I run AEV's. They're at about 4.7" of offset. Been on for about 2000 miles is all. But I will get it back off the ground and look at it some more.

Thanks again for the feedback on the 4Wd drive and the bearings.

Layth is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome