OEM Rubicon Locker Study - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 27 Old 02-09-2013, 09:22 PM Thread Starter
ronjenx
Web Wheeler
 
ronjenx's Avatar
2008 JK Wrangler 
 
Join Date: Jan 2009
Location: Maine
Posts: 4,610
OEM Rubicon Locker Study

A forum member recently sent me his old Rubicon e-locker.
Here is a quote from the owner:
"...when wheeling in tough areas (sand, mud, rocks &tc.) I put the locker in for a while & then take it out, put the locker in for a while & then take it out, repeat. So, I've used it a lot. My Jeep has 105K miles & I'll bet 15-18K of that is off road."

It has seen some good use. The differential and dog clutch show very little wear.
The ring in the 3rd picture below looks quite worn, leaving a small lip at the inner diameter
That could be the cause of locker ratcheting.
Installing a shim to make up the difference has at least temporarily fixed it in some cases.




Here is a look at how the Rubicon e-locker works.




























See this great video to review how a regular differential works:


ronjenx is offline  
Sponsored Links
Advertisement
 
post #2 of 27 Old 02-09-2013, 10:29 PM
durable1
Registered User
2012 JK Wrangler 
 
Join Date: Feb 2011
Location: Long Island
Posts: 223
Great pictures. Very interesting post.
durable1 is offline  
post #3 of 27 Old 02-10-2013, 05:36 AM
TheBoss
Registered User
2012 JK Wrangler 
 
Join Date: May 2010
Posts: 1,949
Well done Sir. You are a valuable asset to this forum.
TheBoss is offline  
post #4 of 27 Old 02-11-2013, 10:05 AM
DBA2GO
Registered User
2008 JK Wrangler 
 
Join Date: Sep 2008
Location: Hurricane
Posts: 1,249
Wahoo! That answers several of my locker questions. Now, this is a technical thread.

One foot in the grave & one foot on the gas pedal!!
DBA2GO is offline  
post #5 of 27 Old 02-11-2013, 02:54 PM
MoreMud
Registered User
2012 JK Wrangler 
 
Join Date: Jan 2011
Location: Waukesha
Posts: 105
One of the best explanations of a locking differential I've seen, thanks for putting it together.

2012 JKU Rubicon
Rugged Ridge Front bumper w/storage ends Rugged Ridge 8500 Winch w/ synthetic rope
PIAA ATP off road lights, full light bar, Terraflex leveling kit, Mygig lockpick
just getting started.....
MoreMud is offline  
post #6 of 27 Old 03-17-2015, 04:09 AM
S_Bartfast
Registered User
2007 JK Wrangler 
 
Join Date: Oct 2013
Location: Adelaide
Posts: 15
Firstly I want to congratulate you on a most excellent post. I've search long and hard for details on the Rubicon Locker and I must say you've done an exceptional write up here.


One question though....
Are you able to explain how it is the spider gears themselves rotate?

The reason I ask is that my front diff started making a horrible noise whenever I turn sharply while 4WD is engaged. I took it to the workshop and they pulled everything apart and found a nice shiney little bonus bit in my locker:

The first thing I thought was that it looked like the needle bearing in a uni cap and I started to wonder where the bearings that the spider gears roll on are. Would it be possible that this part is from one of the spider bearings?

In any event my diff has clearly experienced some serious violence and is in need of a complete rebuild. This is what one of the pins that go through the end of the spider shafts looks like:
S_Bartfast is offline  
post #7 of 27 Old 03-17-2015, 07:34 AM
MrSundays
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2012
Posts: 904
Garage
This is amazing. Thank you. A buddy of mine and I had a debate if it was an e-locker or a low compression clutch. Thanks for the clarification and explanation.

Sent from my pocket brick

SOLD- '13 JKR with lots of goodies
Current- '98 TJ Sahara: build coming in October
MrSundays is offline  
post #8 of 27 Old 03-17-2015, 07:50 AM
Moezer
Registered User
2015 JK Wrangler 
 
Join Date: Aug 2011
Location: calgary
Posts: 1,537
So what would break this locker while off roading? and what will break when it does break the edged dog teeth or the pins

The way its set up its kinda like the spartan locker design
Moezer is offline  
post #9 of 27 Old 03-17-2015, 08:08 AM
JIMBOX
Registered User
2008 JK Wrangler 
 
Join Date: Oct 2008
Location: NORCAL/NORNV
Posts: 7,189
Book of knowledge-


Quote:
Originally Posted by ronjenx View Post
A forum member recently sent me his old Rubicon e-locker.
Here is a quote from the owner:
"...when wheeling in tough areas (sand, mud, rocks &tc.) I put the locker in for a while & then take it out, put the locker in for a while & then take it out, repeat. So, I've used it a lot. My Jeep has 105K miles & I'll bet 15-18K of that is off road."

It has seen some good use. The differential and dog clutch show very little wear.
The ring in the 3rd picture below looks quite worn, leaving a small lip at the inner diameter
That could be the cause of locker ratcheting.
Installing a shim to make up the difference has at least temporarily fixed it in some cases.




Here is a look at how the Rubicon e-locker works.




























See this great video to review how a regular differential works: http://www.youtube.com/watch?v=K4JhruinbWc
If I didn't thank you before RJ, thanks again

Quote:
Originally Posted by S_Bartfast View Post
Firstly I want to congratulate you on a most excellent post. I've search long and hard for details on the Rubicon Locker and I must say you've done an exceptional write up here.


One question though....
Are you able to explain how it is the spider gears themselves rotate?

The reason I ask is that my front diff started making a horrible noise whenever I turn sharply while 4WD is engaged. I took it to the workshop and they pulled everything apart and found a nice shiney little bonus bit in my locker:

The first thing I thought was that it looked like the needle bearing in a uni cap and I started to wonder where the bearings that the spider gears roll on are. Would it be possible that this part is from one of the spider bearings?

In any event my diff has clearly experienced some serious violence and is in need of a complete rebuild. This is what one of the pins that go through the end of the spider shafts looks like:
More great info-thnks SB-

JIMBO

Yellow Jeep No. 683
http://i294.photobucket.com/albums/m...10-snow027.jpg
--YA GOTTA HAVE CLASS--
JIMBOX is offline  
post #10 of 27 Old 03-17-2015, 08:14 AM
Imped
Registered User
2004 TJ Wrangler 
 
Join Date: Feb 2008
Location: Indianapolis
Posts: 20,308
This is a cool thread....the operation is very well-explained for those that require good visuals. I recently built a pair of JKR44's with ARB's and have the factory lockers set aside collecting dust. They were in a fire so not everything is in perfect condition but they'd likely make for great spare parts doners. If any of you guys have interest in them feel free to PM me.

If this is against the rules, go ahead and delete it. But considering the extreme niche market of these parts I'd appreciate the exposure since I have no use for them but others most certainly do.

OlllllllO
Float Test Build
IndyORV
Imped is offline  
post #11 of 27 Old 03-17-2015, 08:50 AM Thread Starter
ronjenx
Web Wheeler
 
ronjenx's Avatar
2008 JK Wrangler 
 
Join Date: Jan 2009
Location: Maine
Posts: 4,610
S_Bartfast ,

The spider gears have no "bearings". They rotate on the shafts that go through them, and are pushed out on cupped and polished, hardened washers. There is enough oil on everything to handle the wear.


When you get the noise while turning sharply in 4wd, is it with the locker engaged?
What kind of noise is it, and what is the steering wheel doing during this.
Also, how much traction do you have at the time?
Did the pin you found cause damage to other parts?

I can't think of anything in the diff that would have small needle bearings. I'll take a close look at mine and see if there is a small pin that could fall out.

Do a search for the word Study in the title to find more threads like this one.

2008 JKU Rubicon
42RLE Auto
ronjenx is offline  
post #12 of 27 Old 03-18-2015, 03:45 AM
S_Bartfast
Registered User
2007 JK Wrangler 
 
Join Date: Oct 2013
Location: Adelaide
Posts: 15
Quote:
Originally Posted by ronjenx View Post
When you get the noise while turning sharply in 4wd, is it with the locker engaged?
Just in regular 4WD, nothing locked.

Quote:
Originally Posted by ronjenx View Post
What kind of noise is it, and what is the steering wheel doing during this.
Also, how much traction do you have at the time?
Aside from the noise everything else is fine. Steers fine, traction's fine. It actually worked perfectly, just sounded awful!

Here's a short video demonstrating the sound before it was disassembled:
I'm in Australia and we drive on the "Queen's Side" here
(And yes, I know you should never engage 4WD on bitumen)


Quote:
Originally Posted by ronjenx View Post
Did the pin you found cause damage to other parts?
It was actually my mechanic who found it (I'm no mechanic myself, just an interested geek) and the second picture is the only part he showed me specifically. I believe the second pic is a "cross pin retainer". I saw the other parts and they kind of looked fine to me but I wouldn't really know. My mechanic didn't mention anything about them specifically but said the "bonus" bit must have gone through the gears at some stage and caused the damage to the second part. If you look closely you can see the pin is both scuffed and bent, and it you look really closely you can actually see that the "bonus" bit is also slightly bent.

Here are links to the full resolution images:
Pin (2.7MB)
BonusBit (2.8MB)
(let me know if you can't download the full res images)


Quote:
Originally Posted by ronjenx View Post
I can't think of anything in the diff that would have small needle bearings. I'll take a close look at mine and see if there is a small pin that could fall out.
No, nor could my mechanic

Quote:
Originally Posted by ronjenx View Post
Do a search for the word Study in the title to find more threads like this one.
Will do.
I think I came across your "Totally Integrated Power Module" thread before. That was a really good piece of work to.
S_Bartfast is offline  
post #13 of 27 Old 01-02-2016, 05:13 PM Thread Starter
ronjenx
Web Wheeler
 
ronjenx's Avatar
2008 JK Wrangler 
 
Join Date: Jan 2009
Location: Maine
Posts: 4,610
For those of you who have worn/broken OEM Rubicon axle locker actuators, new actuators are now available.
I have seen them at the dealer for $62, and from on-line MOPAR parts dealers for less.

Edit to add (4 March 2016):
The price of the actuator now, just 2 months after it was only $62 at the dealer, is about 5.5 times higher.

Here is a picture of the part of the actuator which wears to the point of diminished locking ability. The worn ring is identified in the picture.





Another thing that breaks is the harness, as shown in the picture.






Here is a picture of the new actuator with a not-worn ring.







Here is a picture of the new actuator, and the parts that come with it.


2008 JKU Rubicon
42RLE Auto
ronjenx is offline  
post #14 of 27 Old 01-02-2016, 08:33 PM
222Doc
Registered User
2012 JK Wrangler 
 
Join Date: Sep 2011
Location: Lake Havasu City
Posts: 5,928
Quote:
Originally Posted by ronjenx View Post
For those of you who have worn/broken OEM Rubicon axle locker actuators, new actuators are now available.
I have seen them at the dealer for $62, and from on-line MOPAR parts dealers for less.

Here is a picture of the part of the actuator which wears to the point of diminished locking ability. The worn ring is identified in the picture.





Another thing that breaks is the harness, as shown in the picture.






Here is a picture of the new actuator with a not-worn ring.







Here is a picture of the new actuator, and the parts that come with it.

nice find

http://www.parker4wheelers.net
www.bullhead4wheelersinc.com
222Doc is offline  
post #15 of 27 Old 01-04-2016, 02:32 PM
DBA2GO
Registered User
2008 JK Wrangler 
 
Join Date: Sep 2008
Location: Hurricane
Posts: 1,249
Very good to know. 3 years too late for me; but, great for everyone else. Maybe I'll need another actuator in another 100k miles.

One foot in the grave & one foot on the gas pedal!!
DBA2GO is offline  
Reply

Quick Reply
Message:
Options

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

Password:


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



Email Address:
OR

Log-in









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