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Old 08-20-2013, 12:22 PM   #1
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D30 v. D44 axles - FAQ?

Looking for a FAQ/reference site that explains whats what between the JK's 2 stock axle options.

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Old 08-20-2013, 12:27 PM   #2
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The housings are pretty much the same. Ring/pinion gear is larger in the 44 along with stronger shafts. Basically the internals are different.

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Old 08-20-2013, 12:30 PM   #3
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i thought the only difference between the 30 and 44 is the size of the ring and pinion gear. they have the same axle tube, outer knuckle and u-joints.

if you're reinforcing a dana 30 (c's, sleeves or truss, chrome-moly axles) you've built an axle stronger than a Dana 44... throw in taller gears, and the only weakness is gone...
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Old 08-20-2013, 12:38 PM   #4
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http://www.wranglerforum.com/f33/dan...ure-99437.html

The thread above has a photo and a link to some tips on D30s.

Here's a picture of the gears.

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Edit: as with just about anything, common sense rules.

If you fix up the C's, you probably should gusset the tubes, and then if you don't stop, you're on to shafts and wallet explosions.

I'll do the C's when I go up to 315s on the factory 44s and lay off the stupid pedal.
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Old 08-20-2013, 12:46 PM   #5
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i don't know about wallet explosion... i've probably got 2,500 in my front axle (all over time) and that's way cheaper than buying a new 44 housing and starting over. and i wheel more than most - with 35s and 37s... it's just about being smart with the skinny pedal.

800 - front locker
500 - 4.88 gear
800 - g2 placer gold axles
200 - TF sleeves and c's
200 - synergy ball joints
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Old 08-20-2013, 12:51 PM   #6
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Quote:
Originally Posted by tabber02 View Post
i don't know about wallet explosion... i've probably got 2,500 in my front axle (all over time) and that's way cheaper than buying a new 44 housing and starting over. and i wheel more than most - with 35s and 37s... it's just about being smart with the skinny pedal.

800 - front locker
500 - 4.88 gear
800 - g2 placer gold axles
200 - TF sleeves and c's
200 - synergy ball joints

nice n' strong!

I'm guessing you did the work. I don't have the space or the talent or the tools.

But yeah, if you want to run big tires on a JK 30 or 44 you probably need to "polish the turd" as they used to say. :-)

Good setup. Probably half of a swap job for a custom front in terms of cost.
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Old 08-20-2013, 12:58 PM   #7
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Quote:
Originally Posted by live_slow View Post
nice n' strong!

I'm guessing you did the work. I don't have the space or the talent or the tools.

But yeah, if you want to run big tires on a JK 30 or 44 you probably need to "polish the turd" as they used to say. :-)

Good setup. Probably half of a swap job for a custom front in terms of cost.
thanks, i suppose, but all over time. i didn't pay that at once! makes that a bit more bearable.

i had some help.. got lucky i suppose!
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Old 08-20-2013, 01:04 PM   #8
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Only reason Id spring for the Prorock or TF housing... increase in caster/pinion separation.
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Old 08-20-2013, 01:52 PM   #9
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Quote:
Originally Posted by kjeeper10 View Post
Only reason Id spring for the Prorock or TF housing... increase in caster/pinion separation.

Also stronger tubes, and at least on the ProRock 44 better clearance.

I have seen sleeved stock 44 cracked, but I have also seen ALL types of axle housings cracked/bent. ULTRA4 racers aren't easy on their cars.
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Old 08-20-2013, 03:13 PM   #10
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2012 JKU. I also built up my D30. But with that said if I would have had to pay someone to do it I would have went with the JKUR.
I did C's and gussets, 44 magnum sleeves, synergy ball joints, chromoly axles, Yukon 4.88 cryo treated R&P, ARB lockers and diff covers.
I would say I don't wheel the real crazy trails. Mostly stuff like Hell's Revenge, Fins and things those kind of trails in Moab. Red cone pass, Radical Hill, McAllister Gulch, Wheeler lake. So far so GREAT the Jeep has made the trails very easily. I do like that I have choices in what lockers I turn on. The build has exceeded my expectations do far.
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Old 08-20-2013, 04:08 PM   #11
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What do you mean by "c's"?
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Old 08-20-2013, 04:12 PM   #12
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They also have Heavier axle shafts with more spline count...........
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Old 08-20-2013, 04:27 PM   #13
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Quote:
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What do you mean by "c's"?
the "C" around the knuckle.. you can see where the gusset was welded on
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Old 09-19-2013, 08:28 PM   #14
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Thanks to all who contributed.

To sum up the thread so far...

same housings and externals
different ring, pinion and shafts

Anything else?

Trying to find a link to a parts catalogue with pictures, descriptions etc - but no luck yet.
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Old 09-19-2013, 08:41 PM   #15
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that's a good summarization
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Old 09-19-2013, 09:08 PM   #16
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Quote:
Originally Posted by JKURz Wild View Post
Thanks to all who contributed.

To sum up the thread so far...

same housings and externals
different ring, pinion and shafts

Anything else?

Trying to find a link to a parts catalogue with pictures, descriptions etc - but no luck yet.
The shafts are larger, more durable and also have a larger spline count.

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