Aussie Locker in Dana 44 - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 17 Old 06-13-2011, 09:11 PM Thread Starter
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Aussie Locker in Dana 44

So I recently wheeled with a guy who has Aussie lockers front and rear in his XJ and it got me thinking even more about my rear axle. Seeing as how I have the Aussie in the front and love it, I'm thinking I want to add an Aussie in my rear non-rubi 44. I've read all sorts of different things at different places about the Aussie for a 30 spline dana 44 not working in out JKs...does anyone know if any of this is true or if it will work?

Is anyone running an Aussie or Spartan locker in the rear 44?

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post #2 of 17 Old 06-13-2011, 09:22 PM
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Originally Posted by Joneszj View Post
So I recently wheeled with a guy who has Aussie lockers front and rear in his XJ and it got me thinking even more about my rear axle. Seeing as how I have the Aussie in the front and love it, I'm thinking I want to add an Aussie in my rear non-rubi 44. I've read all sorts of different things at different places about the Aussie for a 30 spline dana 44 not working in out JKs...does anyone know if any of this is true or if it will work?

Is anyone running an Aussie or Spartan locker in the rear 44?
why not a detroit? mine has been great.

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post #3 of 17 Old 06-13-2011, 09:25 PM
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I'll tell you what I know. I waited a year for a JK specific Aussie for the D30 only to find there was a running change somewhere and I didn't need the JK specific blue shims. I'd call them direct and ask what the chances are of it working. The tech I spoke with was great.
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post #4 of 17 Old 06-13-2011, 09:36 PM
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I plan on running the Dana44 Aussie in my open rear diff. I was going to use a Detroit but I am pinching pennies right now so I'm trying to get the most out of my dana44. I know someone on here is running it. I can't remember who I talked to about it but he said it installed the same as the front and no issues. Needs to be a completely open dana44 for it to work.

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post #5 of 17 Old 06-13-2011, 09:54 PM
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if cost is an issue, i welded my spider gears when my jk had 1K mile on it, now she has 12K and still no problems...

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post #6 of 17 Old 06-13-2011, 10:42 PM
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why not a detroit? mine has been great.
because 1 he can do by himself in the garage and the other requires a little better set of tools.
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post #7 of 17 Old 06-14-2011, 02:37 AM
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The carrier that was in mine had a bunch of shim packs in it. I don't know if you can take those shim packs out, I don't believe you can. This was on a jeep with the track lock. I broke my rear carrier, ring and pinion so I replaced the carrier with one out of a Dana 44 from an older full size jeep, which is fully open, and a set of 4.10 gears Adam from Tribe gave me. So I plan on running a lunch box locker in the rear of mine but only cause I have a carrier out of an older jeep that it can go in.
I don't think it would work without a different carrier.
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post #8 of 17 Old 06-14-2011, 04:18 AM
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i dont think they make an aussie for the jk d44.

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post #9 of 17 Old 06-14-2011, 07:12 AM
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why not a detroit? mine has been great.
Yeah, I'm really happy with my Detroit too.
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post #10 of 17 Old 06-14-2011, 08:54 AM
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Originally Posted by HOT_DAMN View Post
The carrier that was in mine had a bunch of shim packs in it. I don't know if you can take those shim packs out, I don't believe you can. This was on a jeep with the track lock. I broke my rear carrier, ring and pinion so I replaced the carrier with one out of a Dana 44 from an older full size jeep, which is fully open, and a set of 4.10 gears Adam from Tribe gave me. So I plan on running a lunch box locker in the rear of mine but only cause I have a carrier out of an older jeep that it can go in.
I don't think it would work without a different carrier.
Pic of all the stuff that is in the center of the stock JK carrier.
There are a lot of X models out there with open diffs. This one was a limited slip.

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post #11 of 17 Old 06-14-2011, 10:07 AM
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There are a lot of X models out there with open diffs. This one was a limited slip.
Thats what I was thinking. Mine is a Sahara so maybe they come with a limited slip. I would think as long as you have an open carrier you should be able to get a lunch box locker. Get one that fits in a Dana 44 with 30 spline shafts and you should be good to go.
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post #12 of 17 Old 06-14-2011, 11:49 AM
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The JK D44 (open or LSD) won't accept a Lunchbox locker (unless something VERY new is out now). You'll need to change out the carrier for an open carrier from an earlier version. You'll need a 3.73 and down case, not the 3.92 and up case that you would expect. All D44 JKs use a 'thick' gear and the 3.92 and up case will not work with any gear set. You'll also need to drill out the ring gear flange as JK 44s all have 7/16" or 1/2" ring gear bolts. The earlier cases used 3/8" bolts.

I never recommend a lunchbox for rear axle applications as failure is pretty common. These lockers also wear over time (a Detroit doesn't) and will wear out. You can gain extra life in them by flipping the gears from side to side BEFORE they wear too far.
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post #13 of 17 Old 06-14-2011, 12:42 PM Thread Starter
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Originally Posted by Dynatrac View Post
The JK D44 (open or LSD) won't accept a Lunchbox locker (unless something VERY new is out now). You'll need to change out the carrier for an open carrier from an earlier version. You'll need a 3.73 and down case, not the 3.92 and up case that you would expect. All D44 JKs use a 'thick' gear and the 3.92 and up case will not work with any gear set. You'll also need to drill out the ring gear flange as JK 44s all have 7/16" or 1/2" ring gear bolts. The earlier cases used 3/8" bolts.

I never recommend a lunchbox for rear axle applications as failure is pretty common. These lockers also wear over time (a Detroit doesn't) and will wear out. You can gain extra life in them by flipping the gears from side to side BEFORE they wear too far.
Great info. I have the trac-loc limited slip in the rear but its so beat up that it acts like an open carrier. I've been leaning toward a detroit for a while, but i think i may go lunchbox because its about $400 cheaper and i love the aussie in my front 30.

So as I understand it, if I get a dana 44 carrier from out of a TJ that is 3.73 and down I can use my JK 5.13 "thick" ring gears, drill out the holes to make it fit, then install the lunchbox locker?

I may save longer and go for a detroit, but it all depends how impatient I get.

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post #14 of 17 Old 06-14-2011, 12:51 PM
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Originally Posted by Joneszj View Post
Great info. I have the trac-loc limited slip in the rear but its so beat up that it acts like an open carrier. I've been leaning toward a detroit for a while, but i think i may go lunchbox because its about $400 cheaper and i love the aussie in my front 30.

So as I understand it, if I get a dana 44 carrier from out of a TJ that is 3.73 and down I can use my JK 5.13 "thick" ring gears, drill out the holes to make it fit, then install the lunchbox locker?

I may save longer and go for a detroit, but it all depends how impatient I get.
You are correct. The same work (actually more) will be required to put in an open diff with a lunchbox compared to a Detroit. Also, one bit of advice, check the ring gear backlash before you remove the existing gear. Regardless of the measurement, you need to copy this measurement when you install the new(different) differential. This is crucial.
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post #15 of 17 Old 06-16-2011, 12:21 PM
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Your guys advice on this board is excellent. This type of support is the reason Dynatrac is a Major Player.

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post #16 of 17 Old 02-08-2012, 09:14 AM
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post #17 of 17 Old 06-01-2015, 04:42 PM
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Hi Folks, Cora from Aussie Locker here to help with questions.

Aussie Locker is the only Automatic Locker on the market with JK specific lockers.

You can't install an auto locker in the rear axle of 2012 and newer JK's with automatic transmissions - it's a wheel speed sensor issue and will throw the vehicle in to limp mode. We are currently working with SuperChips to address this issue.

Aussie Lockers can only be installed in Open Carriers.

Hope this helps, let me know if any other questions come up or if I missed any.

Thanks!
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