Rubicon Dana 44 vs. J8 Dana 44 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Like Tree18Likes
  • 1 Post By Loganakers1512
  • 3 Post By JTPhoto JK
  • 3 Post By JTPhoto JK
  • 1 Post By JTPhoto JK
  • 3 Post By JTPhoto JK
  • 4 Post By TerryC6
  • 1 Post By JTPhoto JK
  • 1 Post By JTPhoto JK
  • 1 Post By gobi_rubi
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-22-2018, 02:54 AM
Thread Starter
  #1
Newb
 
Join Date: Jul 2016
Posts: 12
Rubicon Dana 44 vs. J8 Dana 44

I am going to be swapping out my stock dana 30 front axle. I was going to go with a Rubicon 44 front axle housing but I have heard the J8 44 housing is a lot better. Can I please hear your input on this? What are the differences. Are both of these axles the same width also, I didn't want my front axle wider than the rear. Thanks!

gStev likes this.
Loganakers1512 is offline   Quote
Old 09-22-2018, 09:50 AM   #2
Jeeper
 
Hedgehog2JKU's Avatar
 
Join Date: Jul 2016
Location: Johnstown Ny
Posts: 2,151
pretty sure the j8 has 3/8" thick tubes vs 1/4" on the rubicon. also has 1/4" bracketry vs 3/16".

__________________
2011 JKU Sport: 37-12.50-R17 Ironman M/T's, vision nemesis wheels, 4.75" EVO coils, 1" body lift, Falcon 3.3 shocks, Fusion 4x4 hybrid dana 60 axles
Overkill gets you off the trails and keeps you and those with ya enjoying the day
For those that get it, no explanation is needed. For those that don't, no explanation is possible.
My JKU on a Budget Build Misanthropic to the core
Hedgehog2JKU is online now   Quote
Old 09-22-2018, 11:05 AM   #3
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Rubicon Dana 44 vs. J8 Dana 44

Quote:
Originally Posted by Loganakers1512 View Post
I am going to be swapping out my stock dana 30 front axle. I was going to go with a Rubicon 44 front axle housing but I have heard the J8 44 housing is a lot better. Can I please hear your input on this? What are the differences. Are both of these axles the same width also, I didn't want my front axle wider than the rear. Thanks!


The Hybrid D44 with J8 tubes Mopar D44HD/J8 PN # P5160036 is the way to go. I built 2 of these. The actual full J8 D44 is same width as the Rubi D44 but has bigger bearings and bigger wheel bolt pattern which would require different wheels. The J8D44 does not have a locker but rather an open diff, the D44HD/J8 has the Rubicon center section so it is compatible with all Rubicon D44 parts. The Cs are slightly bigger but not a concern anyway as even the stock D44 Cs donít bend, it has been the tube at the C weld that bends giving the impression that the C is bent.
The D44HD/J8 housing (same housing as the Dana UD44) can be purchased from your Mopar dealer or on line. If you canít or donít want to build your own just purchase the Dana Spicer UD44 with the options you want.


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Sponsored Links
Advertisement
 
Old 09-22-2018, 03:34 PM   #4
Jeeper
 
JKURz Wild's Avatar
 
Join Date: Aug 2012
Location: Interior, BC
Posts: 838
Quote:
Originally Posted by JTPhoto JK View Post
The Hybrid D44 with J8 tubes Mopar D44HD/J8 PN # P5160036 is the way to go...

How do these compare to the front axles in the Recon?
Quote:
An upgraded Danaģ 44 front axle with military-grade axle tubes and heavy duty forgings guarantees superior strength, rigidity and durability.
https://www.jeep.com/limited-edition...con-recon.html




I could not readily find a part # for the Recon's front axle.
JKURz Wild is offline   Quote
Old 09-22-2018, 04:05 PM   #5
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Rubicon Dana 44 vs. J8 Dana 44

Same axle housing as the Recon.. Which is also the same housing as the Dana Spicer UD44 (Ultimate 44).


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 09-22-2018, 04:11 PM   #6
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
I built this one with the OX Locker and Yukon 5.38 gears.


Sent from my iPhone using Tapatalk
n3tfury likes this.
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 09-22-2018, 05:30 PM   #7
Supporting Member

5-Year WF Supporting Member
 
Join Date: Jun 2015
Location: Vegas
Posts: 687
The Recon sales flyer said:
Military Inspired Dana 44 Front Axle
A Dana 44 front axle is beefed up with 25% thicker
uprated tubing and heavy-duty end forgings.

If stock Rubicon thickness is 1/4" then the Recon would have nominal 5/16" thick tubes, if that flyer is correct.
15anvil is online now   Quote
Old 09-22-2018, 07:14 PM   #8
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
And that is correct. Billet axle tube end seals do not fit because the tube is too thick.


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 09-22-2018, 10:23 PM   #9
Jeeper
 
Join Date: May 2018
Location: Visalia, CA
Posts: 2,312
I'm more curious about the outside diameter of the axle tubes not the thickness. Physics is funny that way.
__________________
*Often posts while drunk, responses and post after 6pm pst and the following 12 hours should never be taken seriously. You have been warned.
fuzzylogic_y2k is offline   Quote
Old 09-22-2018, 11:47 PM   #10
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Outside diameter is the same as stock so all stock accessories/brackets still fit.


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 09-23-2018, 12:21 AM   #11
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 7,149
Well most of us don't have Jeff's skills when it comes to building axles though it is a skill I intend to learn before my next build. Junk 60's and 80's is what I will be doing. But in the mean time there is the Ultimate 44 which you can get from Northridge 4x4 for $2995 in your choice of gears and an E-locker. That is a very good deal in my mind.
__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is online now   Quote
Old 09-23-2018, 01:04 AM   #12
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Yes Terry I agree, the Ultimate 44 is a great value...


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 09-23-2018, 04:03 AM
Thread Starter
  #13
Newb
 
Join Date: Jul 2016
Posts: 12
Since I am going to be getting the J8 dana 44. Would you even bother on a truss? Or should I just do the C gussets?
Loganakers1512 is offline   Quote
Old 09-23-2018, 04:14 AM
Thread Starter
  #14
Newb
 
Join Date: Jul 2016
Posts: 12
I can also still use the same knuckles on the J8 44 correct?
Loganakers1512 is offline   Quote
Old 09-23-2018, 04:48 AM   #15
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 7,149
Quote:
Originally Posted by Loganakers1512 View Post
Since I am going to be getting the J8 dana 44. Would you even bother on a truss? Or should I just do the C gussets?
Well that really comes down to how far you are going to push it. Axle tube strength is really determined by diameter, not thickness of the wall. Think of wall thickness as armor against penetration, like coming down on a sharp rock. Diameter is what provides greater bending resistance.

Add a sleeve (now .5 inch wall) to a stock 44 will increase the bending strength by about 60 percent. Add a truss and you increase the strength by 400%. You really have to go to 3.5 inch tubes to get something stronger.

As far as C's go I think on any 44 they are a good idea. But then again I tend to overkill things.
__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is online now   Quote
Old 09-23-2018, 09:37 AM   #16
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Rubicon Dana 44 vs. J8 Dana 44

Quote:
Originally Posted by Loganakers1512 View Post
I can also still use the same knuckles on the J8 44 correct?


Yes the factory knuckles fit the D44HD/J8 housing.
My opinion on the strength is that if itís strong enough for military use then itís fine as is. BUT, if you think you are gonna wheel that hard that you need a truss and gussets, donít waste your money, just get a Dynatrac Or Currie D44.


Sent from my iPhone using Tapatalk
jku007fl likes this.
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 09-23-2018, 09:45 AM   #17
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Rubicon Dana 44 vs. J8 Dana 44

Just for clarification. The J8D44 Military housing and the Mopar Performance D44HD/J8 are both structurally the same strength. The difference is the center section. The D44HD/J8 has the Rubi center which allows full swap for Rubicon internals whereas the Military J8D44 has SAE bearings and takes the open or traditional locking carriers.
If purchased complete the Military J8D44 also comes with different knuckles that carry a bigger unit bearing which also gives you a 5x5.5 wheel bolt pattern (Dodge Ram pickup) and the bigger Dodge Ram brakes.

And yes you can use those Military knuckles with bigger bearings and brakes on the standard Rubi D44 however you have to source the parts including the Military Master cylinder as there is no kit available that I am aware of. (I have part numbers if interested).


Sent from my iPhone using Tapatalk
JKURz Wild likes this.
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 05-11-2019, 02:28 PM   #18
Newb
 
Join Date: Jan 2018
Posts: 6
So which are you saying is better? P5160036 J8/D44 or the spicer ultimate 44?
14jkuCCMa is offline   Quote
Old 05-11-2019, 06:39 PM   #19
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Quote:
Originally Posted by 14jkuCCMa View Post
So which are you saying is better? P5160036 J8/D44 or the spicer ultimate 44?


The Spicer UD44 is in essence a Mopar Performance JKD44HD/J8 (P5160036) already built for you or custom ordered to suit your needs.


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 05-27-2019, 09:23 PM   #20
Newb
 
Join Date: Jan 2018
Posts: 6
JTPhoto are you positive the tubes are the same? thickness and OD?
14jkuCCMa is offline   Quote
Old 05-28-2019, 10:34 AM   #21
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
When the UD44 First came out they were the same housing as the JKD44HD/J8. They are definitely the same OD and wall thickness unless they have changed that lately..
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 01-24-2020, 12:18 PM   #22
Newb
 
Join Date: Aug 2016
Posts: 3
I’m thinking of doing the J8 Dana 44. What else will I need to replace my Dana 30? Will the Dana 30 axles shaft fit this Dana 44 or will I need shafts from a Dana 44?
bigelv is offline   Quote
Old 01-24-2020, 12:46 PM   #23
IITYWTMWYBMAB

::WF Administrator::
 
4Jeepn's Avatar
 
Join Date: Apr 2005
Location: Florence, KY
Posts: 12,394
Quote:
Originally Posted by bigelv View Post
Iím thinking of doing the J8 Dana 44. What else will I need to replace my Dana 30? Will the Dana 30 axles shaft fit this Dana 44 or will I need shafts from a Dana 44?
you will need new shafts.. the 44 use 30 spline vs 27 of the dana 30.. I think the ultimate 44 comes with new shafts so all you need to do is swap over outter c's brakes etc.. not sure if the unit hub is the same or not. compare cost of course.
__________________
79.96.85.00.01.97.00.97.93.97.95.94.15
CJ.XJ.CJ. TJ. TJ.ZJ. TJ.TJ. ZJ.ZJ.YJ. XJ. JK


JKU Build Inside: Party Girl
WranglerForum: Youtube Channel https://www.youtube.com/channel/UCHO...TLdAuMbTLs_bxw

JKUR 2" Rancho Sport - BlackForest Throwback Top - Milestar 315 Patagona Mt's - Outlaw Sheriff Rims - Bushwacker Flat Fenders -
Spicer Parts F/R Diff Covers, Front Drive Shaft - 4340 Alloy Shafts- Metal Cloak Overland Rock w/Flip Step -JCR Transmission Skid- Quadratec LED Headlights- Q9500i winch
4Jeepn is online now   Quote
Old 01-24-2020, 01:26 PM   #24
Newb
 
Join Date: Aug 2016
Posts: 3
Well if I need new shafts I might as well just get the j8 housing and some rcv shafts and it’s still cheaper than ultimate 44
bigelv is offline   Quote
Old 01-24-2020, 02:04 PM   #25
Jeeper
 
Join Date: Mar 2013
Location: Reston, Va
Posts: 94
I did that (bought a J8 housing and had it built). Lots of advantages both in terms of price and in that it was easy to have truss kit and gussets welded on before assembly.

I was able to get the housing for around $850 from Quadratec at the time. They still have em listed for $1173 but most Jeep club memberships will get you a discount of some sort.


https://www.quadratec.com/p/mopar/he...ep-wrangler-jk


Sent from my iPhone using Tapatalk
Ta Tonka is offline   Quote
Old 01-24-2020, 04:00 PM   #26
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Mopar Overstock still lists the housing for $965.
Definitely a cost saving alternative for the average guy.
RCV are definitely worth while. I also put the OX Locker in mine.


Sent from my iPhone using Tapatalk
__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Old 01-24-2020, 04:10 PM   #27
Moderator

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
jadmt's Avatar
 
Join Date: Sep 2012
Location: missoula
Posts: 21,490
@JTPhoto JK curious if you have ever done an alignment and if so what was your camber?
__________________
2018 Gobi Recon unlimited W/Mopar 2" lift coils combined with RK rear coils wedges, TF lower control arms, rear TF monster track bar and rear track bar bracket and Falcon 3.1 shocks, Cooper ST Maxx 315/75-17 on AEV Salta rims, Grabars, RE gas skid tank, mopar head liner, Warn VR10 and Maximus3 winch plate.
https://www.wranglerforum.com/f314/y...i-2192385.html
jadmt is offline   Quote
Old 01-24-2020, 05:23 PM   #28
Jeeper
 
gobi_rubi's Avatar
 
Join Date: Nov 2018
Location: SE WI
Posts: 295
Quote:
Originally Posted by Loganakers1512 View Post
Since I am going to be getting the J8 dana 44. Would you even bother on a truss? Or should I just do the C gussets?
FYI, I bent my Recon housing. Straightened and trussed now. An alignment after showed it was right in the middle of the specs. Realistically, adding 1/16" thickness without increasing OD doesn't gain as much strength as you might hope...Only 15% stronger according to my calculation. A truss will improve it much more
sammaz likes this.
gobi_rubi is offline   Quote
Old 01-24-2020, 11:52 PM   #29
Jeeper
 
JTPhoto JK's Avatar
 
Join Date: Jun 2011
Location: Thunder Bay ON Canada
Posts: 5,032
Quote:
Originally Posted by jadmt View Post
@JTPhoto JK curious if you have ever done an alignment and if so what was your camber?


No never did an alignment at a shop always did my own. That housing with no truss or C gussets had 100,000klm on it running 37x12.50x17 Pitbulls the whole time. There did not appear to be a problem with camber like there was on my replaced D30. Front tires did not have wear indicating bad camber.


Sent from my iPhone using Tapatalk

__________________
Jeff _(OIIIO)_

2018 Rhino Rubicon 35s for now.

08 Black and Khaki JK Sahara Unlimited (GONE) My BRUTUS BUILD
JTPhoto JK is online now   Quote
Reply

Tags
axle swap , dana 30 , dana 44 , j8 dana 44 , rubicon

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off






All times are GMT -5. The time now is 11:28 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeepģ, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.