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Old 01-14-2004, 08:21 AM   #1 (permalink)
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Rubicon Air Locker?

Anyone use a rubicon air locker in any regular dana 44 housing and gears, is there anything different about them? Also anyone know what pressure they take to opperate? I am getting a whole housing for free so I'm seeing what my options are.
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Old 01-14-2004, 08:45 AM   #2 (permalink)
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Inside these Dana 44s, you’ll find front and rear locking 4.10:1 differentials built by Tochigi Fuji Sanjyo, chosen, according to Jeep engineer Jim Repp, “because they were the only ones we couldn’t break.” These lockers, which can be actuated at speeds up to 10 mph, require 5 psi to make them work. When the lockers are unlocked, they are limited slip units...

EDIT: only rear is limited slip in unlocked condition!!!!

I found this info on........

http://www.fourwheeler.com/featuredvehicles/77698/
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Old 01-14-2004, 08:55 AM   #3 (permalink)
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Thanks, that cutaway is cool. I thought that the rear is a LSD when unlocked and the front is open. Can anyone confirm? They use two little air compressors, one for each diff, mounted next to the T-case. I was thinking about just buying one of those to operate it. Has any one replaced one or know how expensive they are?
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Old 01-14-2004, 08:59 AM   #4 (permalink)
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Drew, are you planning on just using the locker in your existing D44? Or are you planning a full out swap?

And yeah, looking at that article, it shows the cut out of the rear locker and says it is limited slip. So I stand corrected. I guess the front is not. My mistake. But I would bet that the rear would work fine in front.

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Old 01-14-2004, 09:20 AM   #5 (permalink)
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I just want to use the locker in my current 44.
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Old 01-14-2004, 09:59 AM   #6 (permalink)
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I believe the carrier specs are totally different. I know they are at least for the R&P.
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Old 01-14-2004, 10:01 AM   #7 (permalink)
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Quote:
Originally posted by P&T Jeeps_
I beleive the carrier specs are totally different. I know they are at least for the R&P.
So, why would there be a problem with taking that assembly and using it in a later model 44 housing? Worst case scenario, Drew will have to do some grinding.....right?
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Old 01-14-2004, 10:05 AM   #8 (permalink)
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Quote:
Originally posted by KC_JoNeS


So, why would there be a problem with taking that assembly and using it in a later model 44 housing? Worst case scenario, Drew will have to do some grinding.....right?
Yeah...if you can grind to within .0001"
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Old 01-14-2004, 10:05 AM   #9 (permalink)
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Pretty sure the rubi's ring gear is thicker than a standard 44 set. Have heard of people making spacers in order to regear the rubi axles. Try a search to be sure.
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Old 01-14-2004, 10:06 AM   #10 (permalink)
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Quote:
Originally posted by braxton357


Yeah...if you can grind to within .0001"
Well, Drew is rather talented.
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Old 01-14-2004, 10:19 AM   #11 (permalink)
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Any machine work to the carrier would not be a problem. But I talked to the guys at Supior Axle and gave me all the info. The problem is they use the ring gear offset for faster gears so the you would need a thicker ring gear or a spacer to run my current 4.88's. I guess Yukon makes a special gear set for a Rubi for this but I have a high pinion so I'm screwed unless I run a spacer.
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Old 01-14-2004, 10:39 AM   #12 (permalink)
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You might have to run the gears made for a Rodeo. They are a high speed carrier and you can get gears up to 4.56 "I think" for them.
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Old 01-14-2004, 11:40 AM   #13 (permalink)
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Quote:
Originally posted by GOAT1
Thanks, that cutaway is cool. I thought that the rear is a LSD when unlocked and the front is open. Can anyone confirm? They use two little air compressors, one for each diff, mounted next to the T-case. I was thinking about just buying one of those to operate it. Has any one replaced one or know how expensive they are?
Front is open when off, rear is the planetary limited slip. Not sure about the compressors, other than the stock location on the RUBI is not good for here in AK.
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Old 01-14-2004, 07:42 PM   #14 (permalink)
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your parts will work just fine they are no different your gears your carrier and it will work trust me
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Old 01-14-2004, 08:26 PM   #15 (permalink)
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The gears are "thick gears" and the lockers work at 5 psi.

I'm not too sure by how thick "thick gears" is but places like Randys has a separate part for the rubicon 4.88's I believe.
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Old 01-14-2004, 10:59 PM   #16 (permalink)
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Quote:
Originally posted by P&T Jeeps_
I believe the carrier specs are totally different. I know they are at least for the R&P.
IIRC, Rubi's are a type three and "normal" 44's are a type four. Whatever the hell that's supposed to mean besides the parts don't interchange.
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Old 08-02-2005, 11:15 PM   #17 (permalink)
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Goat and Gearman, this is exactly what I'm trying to do. Have either of you done this? I've got a front Rubicon locker and want to put it in a high pinion d44 housing with reverse cut 4.88 gears. So far I haven't had any luck finding an answer on how or even if this will work.

If you did it, can you tell me exactly what ring gear, ring gear spacer, machining, etc that you needed to do it, and where you got the parts from.
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Old 08-03-2005, 07:15 AM   #18 (permalink)
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I gave up on the idea and will just use the complete rubi housing in something else. I popped the cover and it definately uses a thick ring gear. I think your only option is to use a ring gear spacer. I dont know where you would get one though, most of the major gear and diff suppliers should have them.
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Old 08-03-2005, 04:29 PM   #19 (permalink)
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Damn...this swap is looking less and less possible.

Someone needs to make a high pinion dana 44 housing with the cast in UCA that will fit a rubicon locker, and a reverse cut thick 4.88 ring gear. I know a bunch of guys with Rubicon's would buy the housing.
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Old 08-03-2005, 04:48 PM   #20 (permalink)
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Quote:
Originally Posted by ?????
Damn...this swap is looking less and less possible.

Someone needs to make a high pinion dana 44 housing with the cast in UCA that will fit a rubicon locker, and a reverse cut thick 4.88 ring gear. I know a bunch of guys with Rubicon's would buy the housing.
Jeep has made that housing for a long time, all the South American TJ's have a hi pinion 44 housing stock. Currie bought a whole container of them and were reselling them. The rubi housing is not any different than any other 44's, it is just the locker is made for 3.31 gears, not 4.10's hence the special thick ring gears.
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Old 08-03-2005, 05:47 PM   #21 (permalink)
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there is one other difference in a rubi housing... when i worked for SOR we put a rubi 44 housing into a TJ for a customer, and used an ARB, it needed about an extra 100thou of carrier shim per side to get the bearing's tight. so without machine work, i don't know that the rubi locker would fit the standard case, and yes, the deck is just a 3.73 carrier.
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Old 08-03-2005, 06:59 PM   #22 (permalink)
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The ring gear spacer itself doesn't seem that hard to make. If I knew the dimensions, could I just get any machine shop to make one for me? How wide will it need to be for the 4.88 ring gear?
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Old 08-03-2005, 07:02 PM   #23 (permalink)
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What about this?

"The .100" Milled On Each Side Of The Housing Is For Outside Shims. The Ruby Locker Is Not Designed To Use Shims Under The Bearings. The Bearings Will Stick Out .030"-.040" On Each Side And Will Cause Early Failure Of Bearings Or The Carrier. I Have Seen This And The Carrier Will Break Under The Bearing. When This Happens The Carrier
Loads-twists In Housing And Usauly Breaks More Stuff. I Have Also Seen The Air Line Not Clear The Bearing And Cap." 4-banger

Does he have a valid point, or is that bs?
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Old 08-03-2005, 07:06 PM   #24 (permalink)
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dont forget the rubi uses bigger ring gear bolts than a normal 44 too.
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Old 08-04-2005, 06:30 AM   #25 (permalink)
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If I were to swap in a RUBI front 44. Do they make chromo shafts for it? Could I get 4.88 or 5.13 for it? Warn hubs for it? It is HP correct? And does anyonre know the width? Thanks
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