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Old 12-18-2009, 01:01 AM   #1
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ARB Air Lockers

I have a Dana 30 in my Garage with an ARB Air Locker in it. Before I put this under my front end, I wanted to get an opinion from others who have used or do use the ARB. What are the pros and cons to this locker? I'm new to this site, but I did a search and didn't see anything under this topic. Anyways, I'd appreciate your 2 pennies..

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Old 12-18-2009, 01:06 AM   #2
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you have basically the best of the best. You are going to need to hook up the air pump and run the lines but it is a selectable locker. What I would do is buy the arb pump and wiring harness for it- basically makes it plug and play. They even send out the switches too! Enjoy what you have. BTW what is the rear end gear ratio and the front gear ratio?

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Old 12-18-2009, 01:16 AM   #3
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yup Best of the Best
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Old 12-18-2009, 09:40 AM   #4
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Originally Posted by jdhallissey View Post
BTW what is the rear end gear ratio and the front gear ratio?
I'm repeating this for emphasis. A few threads last week pointed out that some people do actually accidentally use an axle with different gear rations. This is catastrophically bad. Make sure the front and rear match.

If you just had a huge "well no freakin' duh" thought, then I apologize for mentioning it. Carry on!
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Old 12-18-2009, 09:46 AM   #5
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Just take great pains to route the air line properly and it'll be a good bulletproof locker. Use ARB's standard air line too, don't use the heavy-duty stuff. Even ARB recommends their standard duty air line and advises against using their heavy duty air line they added only because some customers insisted it be made available. That way if by chance you ever do snag the air line, it will easily snap at that location and make for a simple 10 second repair using ARB's quick splice repair kit. Snagging their heavy duty air line could pull out fittings that couldn't be repaired on the trail.
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Old 12-18-2009, 10:32 AM   #6
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I run ARB's F/R on the black TJ, they work very well and appear to be pretty hard to break. I say that because u can break anything. The factory wiring will only allow you to run the front after you engage the rear. There is s simple remedy for it, just something to be aware of. You might want to go to the ARB site and look up the tech info on the installation of the unit into the housing. YOU WILL NEED to drill a return hole for the oil. Otherwise it will push gear oil out of the breather. Any of the uh....."experts" that tell you anything different are full of crap. I own and run ARB's, and I know first hand, in my rig, from my own personal experience that YOU HAVE GOT TO DO THIS. That being said, its a great locker, sets up easy and so far, I have yet to break it. I know yours is already installed, just make certain they did it during the install. Again, the diagram will show it very plain, you pop the cover and you will know if they did or not.
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Old 12-18-2009, 11:36 AM   #7
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I ran ARB's on one of mine. Few questions: How long have they been sitting? Do you know who did the install? Before you got them.. did you seem them work? Sometimes when ARB's sit with out use for an extending period or if the diff fluid is not clean seals can have some issues. Thus, be sure to have it checked out. Other than that great porduct.
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Old 12-19-2009, 01:09 AM   #8
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The front axle is a Dana 30 with the ARB, the rear is a Dana 44 with a limited slip. Both are 373 geared, (I'd like to go lower later). The axle has sat for a year now. I'll be sure to check it out before I put it in. I really appreciate the advice. I'll stick to the standard airline. I would've suckered in for the HD's. I'll keep ya posted on how it goes. It'll probably be a few months, since I know I'll have to change up the driveshaft once I put the Dana 44 in. Sounds like I outta install an ARB in the Dana 44 before I put it in. I've been told that certain carriers can only handle up to certain size gear. If they have 373's is that the max for the carrier? or can that same carrier handle 456's? Again, thanks for the imput!
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Old 12-19-2009, 06:39 AM   #9
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You will need a low speed carrier
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Old 12-19-2009, 06:52 AM   #10
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Im not sure what a low speed carrier is, the break is between 3.54/3.73 so u are fine there. I was positive that the lowest you could go with the 30 was 4.88 which is what i run, but i just saw a yukon set for 5.38 so... you are good regardless
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Old 12-19-2009, 03:16 PM   #11
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I have an ARB in the front and I love it. However, I have a Detroit in the rear. I was in Moab, and a guy with ARBs front and rear, lost his aircompressor in the bottom of "Launching Pad". we had to drag him out. I figure with the mechanical locker in the rear, where there are no steering issues, the worst that can happen is three wheel drive, rather then be totally open.
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Old 12-19-2009, 03:41 PM   #12
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I was positive that the lowest you could go with the 30 was 4.88 which is what i run, but i just saw a yukon set for 5.38 so... you are good regardless
You sure that 5.38 wasn't for the stronger reverse cut R&P gears the earlier YJ axles run? If so, they wouldn't be compatible with the TJ's standard cut D30.
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Old 12-19-2009, 06:44 PM   #13
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Are there Chromo shafts inthe axle?
IMO stock shafts are not strong enough for a locker.
I destroyed an ARB diff case with a braking shaft.
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Old 12-19-2009, 08:39 PM   #14
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He did say the shafts in the Dana 30 were upgraded, however, I don't know if the spline count was upgraded. I believe he said it warn axles. How do those compare to other brands? The Dana 44 is on the stock axles. He upgraded his Jeep to Dana 60's. I got them in Utah and the Jeep was well taken care of. The axles only had 60k on them. I just broke 70k on my odometer. I originally bought the axles to correct the Death Wobble I had. But, Radial Tires solved the problem. I also bought his extra set of rims so I could have a "street set" and true "off-road set". Are the stock Dana 44 axles enough for tire sizes up to 38"? I actually really like the point that blackjeep51 made about the compressor going out. Thanks for that tip. Also, I was wandering how much it normally costs to shorten a drive shaft? Just so I don't jipped when the time comes...

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