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Old 07-24-2019, 03:28 PM
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Teraflex Terra 44 Questions/Axle Swap Advice

I'm looking at replacing my stock Dana 30 n my 2016 JK Sport with a Teraflex Terra 44.
https://teraflex.com/shop_items/jk-0...ng?sku=3552456

It says on the website that I can "Simply swap over axle shafts, outer knuckles, outer axle assembly, unit bearings, brakes and sensors."

Is this true? Will my stock axle shafts from my Dana 30 fit in this axle housing? This would obviously be a perfect oppurtunity to upgrade my axle shafts- if so, I'd love some suggestions on new ones.

Is there anything else I should consider upgrading, seeing as dropping the axle would be the perfect opportunity to do a lot of other projects.

If anyone has any experience with these axles, I'd really appreciate some feedback!

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Old 07-24-2019, 03:35 PM   #2
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Quote:
Originally Posted by LouBear View Post
I'm looking at replacing my stock Dana 30 n my 2016 JK Sport with a Teraflex Terra 44.

https://teraflex.com/shop_items/jk-0...ng?sku=3552456



It says on the website that I can "Simply swap over axle shafts, outer knuckles, outer axle assembly, unit bearings, brakes and sensors."



Is this true? Will my stock axle shafts from my Dana 30 fit in this axle housing? This would obviously be a perfect oppurtunity to upgrade my axle shafts- if so, I'd love some suggestions on new ones.



Is there anything else I should consider upgrading, seeing as dropping the axle would be the perfect opportunity to do a lot of other projects.



If anyone has any experience with these axles, I'd really appreciate some feedback!


The Terra44 is a direct swap for a RuBi D44. Your D30 axles and internals WILL NOT fit.
However, your knuckles, bearings, brakes and all steering gear will work.
Parts you will need to buy are the axles, carrier, ring and pinion, and master install kit. Your D30 pinion flange (for your driveshaft) will also fit on the D44 pinion.


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Old 07-24-2019, 03:51 PM   #3
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If you take a look in the description on the link you provided it says:
Quote:
INNER AXLE SHAFT UPGRADE

• 0-6” LIFT: REQUIRES aftermarket inner axle shafts to handle the additional power. TeraFlex offers 34.19” passenger side axles (# 304136) & 19.11” driver side axles (# 304120). These shafts MUST be used w/ 2013-2017 JK axle U-joint.


You'll be able to use your factory stub shaft though.
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Old 07-24-2019, 04:28 PM   #4
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I just did this exact swap 2 weeks ago. The link you provided shows the 0-3" housing with 4.56 gears and an ARB locker. You are going to need to contact Teraflex directly to find out the spline count of the ARB locker. Most likely it is a 30 spline (RD117) but before you can order axle shafts you will need to know for sure.


If you change your mind and go with the 4"+ version you will need to buy adjustable front upper control arms that can be extended. For the TERA44 axle the upper control arm mounts on the 0-3" lift are in the same position as the factory housing. But the 4+ housing has the mounts pushed forward due to the raised pinion angle. I didn't see this in the fine print, and so my castor is out of whack, and my front springs are bowed rearward until my new Alpines come this week and I can set the correct pinion angle.

For my swap I ordered the bare housing since I had an ARB RD117 30 spline locker sitting in my garage ready to install. I used 30 spline RCV shafts. 4;88 Revolution gears. Teraflex HD ball joints. Re-used the knuckles, brakes, and unit bearings. Also was able to re-use the driveshaft yoke. Everything was easy-peasy.

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Old 07-24-2019, 04:48 PM
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Quote:
Originally Posted by WineCountryWheeler View Post
I just did this exact swap 2 weeks ago. The link you provided shows the 0-3" housing with 4.56 gears and an ARB locker. You are going to need to contact Teraflex directly to find out the spline count of the ARB locker. Most likely it is a 30 spline (RD117) but before you can order axle shafts you will need to know for sure.


If you change your mind and go with the 4"+ version you will need to buy adjustable front upper control arms that can be extended. For the TERA44 axle the upper control arm mounts on the 0-3" lift are in the same position as the factory housing. But the 4+ housing has the mounts pushed forward due to the raised pinion angle. I didn't see this in the fine print, and so my castor is out of whack, and my front springs are bowed rearward until my new Alpines come this week and I can set the correct pinion angle.

For my swap I ordered the bare housing since I had an ARB RD117 30 spline locker sitting in my garage ready to install. I used 30 spline RCV shafts. 4;88 Revolution gears. Teraflex HD ball joints. Re-used the knuckles, brakes, and unit bearings. Also was able to re-use the driveshaft yoke. Everything was easy-peasy.

Perfect, thank you! I had a feeling that my stock shafts weren't gonna do the trick. No worries there, I already found a set and bookmarked it. Thanks for the point out on the front locker, I had noticed that they didn't put the spline count in the description.
I don't plan on doing the 4"+, as I don't plan on lifting this Jeep that high. Well... don't quote me on that. When I bought it I said I wasn't going to lift it at all, and here we are.
My stock control arms with the relocation bracket should be fine for the time being. I've been planning on getting the Teraflex Sport Fixed Complete FlexArms for 2.5-3 in. Lift, the full set of 8, for a while, and I think I'm just gonna pull the trigger and get them as I'll be 80% of the way there already (at least for the front) to do the swap.

Thanks for the help!
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Old 07-24-2019, 05:27 PM
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Originally Posted by JTPhoto JK View Post
The Terra44 is a direct swap for a RuBi D44. Your D30 axles and internals WILL NOT fit.
However, your knuckles, bearings, brakes and all steering gear will work.
Parts you will need to buy are the axles, carrier, ring and pinion, and master install kit. Your D30 pinion flange (for your driveshaft) will also fit on the D44 pinion.


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The setup I'm buying looks like it comes with the diff housing fully assembled, at least I would hope so because the price jumped 2k when I selected 4.56 gears and the ARB locker option.
I'm under the assumption, from the above post, that all I should need to purchase are a set of new axle shafts.
Thoughts?
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Old 07-24-2019, 08:24 PM   #7
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Quote:
Originally Posted by LouBear View Post
The setup I'm buying looks like it comes with the diff housing fully assembled, at least I would hope so because the price jumped 2k when I selected 4.56 gears and the ARB locker option.
I'm under the assumption, from the above post, that all I should need to purchase are a set of new axle shafts.
Thoughts?
Correct. I did a big rotor kit at the same time to help offset the larger tires.
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Old 07-24-2019, 09:08 PM   #8
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Quote:
Originally Posted by LouBear View Post
The setup I'm buying looks like it comes with the diff housing fully assembled, at least I would hope so because the price jumped 2k when I selected 4.56 gears and the ARB locker option.

I'm under the assumption, from the above post, that all I should need to purchase are a set of new axle shafts.

Thoughts?


That is correct. Sounds like that center section is already complete. If you can do it I would highly recommend the RCV axles. Well worth the money.


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Old 07-25-2019, 12:08 AM   #9
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I bought this axle axle from Morris, but I got it with the 1/2” thick tubes. They have great pricing, frequent 10% off sales, free shipping etc.. https://www.morris4x4center.com/tera...f-3544488.html

I’d suggest you get the 4” corrected caster version, it’s well worth it. I run it with 3.5” coils currently. You can pick up some Rubicon OEM take off axle shafts from Craigslist for $250-300 to swap into it. Teraflex will build whatever you want, they have really good customer service.
I beat the heck out of my R44 and it takes all of it.



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Old 07-25-2019, 07:45 AM
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Originally Posted by TRBOKEV View Post
I bought this axle axle from Morris, but I got it with the 1/2 thick tubes. They have great pricing, frequent 10% off sales, free shipping etc.. https://www.morris4x4center.com/tera...f-3544488.html

Id suggest you get the 4 corrected caster version, its well worth it. I run it with 3.5 coils currently. You can pick up some Rubicon OEM take off axle shafts from Craigslist for $250-300 to swap into it. Teraflex will build whatever you want, they have really good customer service.
I beat the heck out of my R44 and it takes all of it.



Attachment 4165905
You think I should get the 4"+ even though I don't plan on lifting any higher than the 2.5" I currently have?

I don't see why- but if you've got a good reason I'm 100% willing to hear it.
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Old 07-26-2019, 10:39 PM   #11
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Quote:
Originally Posted by LouBear View Post
You think I should get the 4"+ even though I don't plan on lifting any higher than the 2.5" I currently have?

I don't see why- but if you've got a good reason I'm 100% willing to hear it.
2 reasons: #1, if you are going to forever stay on 35" tires and 2.5" of lift, there is hardly a reason to spend $4500 ($5K+ after shafts) on a TERA44. Your D30 is not the wet noodle people make it out to be. In fact I beat the hell out of my D30 on the hardest trails in SoCal for 3 years before this swap. No sleeves, no truss, no C-gussetts. Bone Stock D30. 4.56 gears. 35" tires. Did JUST FINE.

And #2: Because 99% of people who lift 2.5" eventually go to 3.5". (myself included). I PROMISED my wife that "2.5 inches was all I'll ever need, honey! I can clear 35" tires, and I'll NEVER need to go any bigger than that!"

Now I sit on 3.5" with 38's.

Heed my warning: You will never be fully satisfied with 2.5" and 35" tires.


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Old 07-28-2019, 02:24 AM   #12
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Originally Posted by WineCountryWheeler View Post
2 reasons: #1, if you are going to forever stay on 35" tires and 2.5" of lift, there is hardly a reason to spend $4500 ($5K+ after shafts) on a TERA44. Your D30 is not the wet noodle people make it out to be. In fact I beat the hell out of my D30 on the hardest trails in SoCal for 3 years before this swap. No sleeves, no truss, no C-gussetts. Bone Stock D30. 4.56 gears. 35" tires. Did JUST FINE.

And #2: Because 99% of people who lift 2.5" eventually go to 3.5". (myself included). I PROMISED my wife that "2.5 inches was all I'll ever need, honey! I can clear 35" tires, and I'll NEVER need to go any bigger than that!"

Now I sit on 3.5" with 38's.

Heed my warning: You will never be fully satisfied with 2.5" and 35" tires.



The truth has been spoken.
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