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View Poll Results: Which front axle to build
D30 HP 25 92.59%
D44 2 7.41%
Voters: 27. You may not vote on this poll

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Unread 11-20-2011, 12:44 PM   #1
FG Jeep
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should i build my D30?

My 98 has a hp D30 front axle. With my current tire and lift setup i will need to regear. But at the same time i want to add some strength to the axle setup. But i've always had the the thought process that putting money into a D30 really wasn't worth the time. Granted the HP is the best one to choose if you were going to go that route.

My plan is 33x12.50x15 MTR's, i'm currently on 32x11.50x15's. I may at some point put 35's on one day but for the foreseeable future i will be on 33's.

So my build plan if i decided to build the D30 HP is as follows.
Regear
Chormoly axles with full circle snap rings
ARB air locker(i have one for the rear already)
Tube sleeves
Diff cover

When i price this out i'm probably half way to the price of a G2 D44 with an arb. I could go jy route for a d44 but by the time i put all the work into turning the C's adding spring buckets and then all the upgrade parts i'm into a lot for d44 not to mention all the time into modding the housing to make it work. Plus up here in the chicagoland area D44 front axles are pretty scarce finds in the junkyards since most of the vehicles that had them rotted out and ended up in the junkyard over 15 years ago. So prices are pretty inflated for a housing.

So at this point i'm just trying to make up my mind on if i should put money into the D30 and keep wheeling on it or go to a D44. It's fairly pricey upgrade but i wheel my xj quite a bit these days and it only sees limited daily driver use.

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Unread 11-20-2011, 01:44 PM   #2
xjfever
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I would build the d30 if it were me. I have ran 35's on several different d30's and have only broken one of them, and that was being stupid. I would just gear it, lock it, and truss it, along with some nice axles. All of mine had stock axles with 35's though so if you aren't too hard on it those would be optional. The d44 isn't that much stronger and has the same weak point as the d30 anyway.
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Unread 11-21-2011, 07:38 PM   #3
GrnJeep
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Truss it and forget the retubing. I seen somewhere a chart to truss strength ratio and the truss was WAY stornger than the retubed axle. Keep in mind to build the axle how you want your weak point, u-joint or ring and pinion. Only reason I see to try a 44 is the 5.13 gear ratio. Where as the 30 goes to 4.88's.
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Unread 11-21-2011, 07:48 PM   #4
mynameislarry
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here are my reasons why i think you should keep your current axle:
-you already have it
-you can run up to 37's with a built hp d30
-ground clearance
-same u-joints and knuckles as d44
-only 10% weaker than a lp d44(both in stock form)

if all your jeep is going to see is 35's, my opinion is that keeping your current axle is the way to go.
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Unread 11-21-2011, 08:11 PM   #5
Ibnzmonkey
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I'm building my spare HP-D30 because its the Honey Badger of the front live axle world. It don't give a F@#K!

Plus, 35's is the largest size im going to run on my DD/Weekend Warrior XJ.
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Unread 11-21-2011, 09:27 PM   #6
Tom95YJ
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Build the 30 !

Truss, regear, Chromoly Shafts and call it good as done !
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Unread 11-21-2011, 09:35 PM   #7
FG Jeep
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If i were to go through the trouble of getting a D44 i would get a hp one. A G2 unit optioned the way i want is about 2900 not including shipping. A pro rock is in a similar price range. I just don't want to spend the money building a 30 if it it going to constantly be breaking. I rather add some strength so i can wheel it harder with a little piece of mind.

I know that at some time or another something is going to break. That is the nature of the game. But i sure would like to lower the chances.

It looks like the general consensus is to keep the hp30.

So if i do the hp30, is the 30 spline upgrade worth the money? since the outters are still 27 spline?
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Unread 11-21-2011, 10:21 PM   #8
whitexj98
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The thing I don't like about the G2 stuff is that you reuse your knuckles/ hubs and brakes. The advantage is the bigger ring gear and 30 spline inners, but the exact same size u joint as your 30 now. And unless they supply different/expensive hubs they have to be 27 outers also but I can't see where they say if they do or not
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Unread 11-22-2011, 03:53 PM   #9
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Its a tough call.

For a D30 you can throw in an ARB, RCV shafts, Truss it, and it will hold up to 35's pretty well.

But at that point your into it for almost 2K and thats if you install and weld everything on yourself.

For roughly double that you can get a prorock D44 and just get stupid with 4LO and the rev limiter and never break it on 35's.

Its really about how much money YOU want to spend. Either will handle what your asking of it.
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Unread 11-23-2011, 12:11 AM   #10
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Quote:
Originally Posted by FG Jeep View Post
So if i do the hp30, is the 30 spline upgrade worth the money? since the outters are still 27 spline?
No. I would rather have RCV shafts than 30-spline upgrade. Just realize that eventually the R&P will be the weak point on that axle. You could do hubs to try and keep that your weak link... I can't say I regret doing the hubs. I love them but I have so much money in my axle I definitely could have bought an off-the shelf 44 or probably even a 60.

Someone mentioned the ProRock 44. This axle is based off of the JK44. Yes you can put one in your XJ but to keep the same 4.5" bolt pattern you are keeping your stock sized outer shafts and u-joints. If you are going all out you should at least throw in RCVs or go with JK stuff and run 5" bolt pattern. The ProRock 44 Unlimited housing and new generation 44 gears definitely make it the strongest 44 out there.
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Unread 11-23-2011, 06:29 AM   #11
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Quote:
Originally Posted by EricsXJ View Post
No. I would rather have RCV shafts than 30-spline upgrade. Just realize that eventually the R&P will be the weak point on that axle. You could do hubs to try and keep that your weak link... I can't say I regret doing the hubs. I love them but I have so much money in my axle I definitely could have bought an off-the shelf 44 or probably even a 60.

Someone mentioned the ProRock 44. This axle is based off of the JK44. Yes you can put one in your XJ but to keep the same 4.5" bolt pattern you are keeping your stock sized outer shafts and u-joints. If you are going all out you should at least throw in RCVs or go with JK stuff and run 5" bolt pattern. The ProRock 44 Unlimited housing and new generation 44 gears definitely make it the strongest 44 out there.
This thread is helpful, because it's really nice to see all the pro's and con's laid out in front of you.

I don't have an issue with the 5" bolt pattern. My big thing is i don't want put 1500-2000 into an axle that isn't going to hold up. If start blowing ring and pinions all the time what good is that. I'm half way to an upgrade at that point.

On another side note, Eric how are those 4.56's with the 35's? I'm trying to decide between 4.56's or 4.88's for my regear ratio.
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Unread 11-24-2011, 10:50 PM   #12
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Quote:
Originally Posted by FG Jeep View Post
On another side note, Eric how are those 4.56's with the 35's? I'm trying to decide between 4.56's or 4.88's for my regear ratio.
4.88 would be better. At the time 4.56 was the lowest I could go with the 8.25 and I had that gearing with 33's first. Its kind of like driving on 31's with stock gears - not too bad but definitely could be better.
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Unread 11-25-2011, 09:32 AM   #13
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Build the d30.
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Unread 11-25-2011, 04:03 PM   #14
FG Jeep
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Quote:
Originally Posted by EricsXJ

4.88 would be better. At the time 4.56 was the lowest I could go with the 8.25 and I had that gearing with 33's first. Its kind of like driving on 31's with stock gears - not too bad but definitely could be better.
That's kind of what I figured. I also have a 8.25 rear and was happy to see 4.88's were available now.

I think I'm going to build the 30 for the time being. After thinking about it I rather not spend 3-4 grand building a d44 at this time. Maybe in the future that may become an option but right now I'm going to go this route.

Next question I have is has anybody done a truss and tube sleeves? I like the simplicity of tube sleeves but I know a truss will be a better over all option.

I was thinking the following
Truss
Tube sleeves
Gussets for the c's
Control arm bracket skids
Diff cover along with maybe a skid too.
4.88's
Arb
Moly axles with full circle snap rings

I have 2 year old moog life time ball joints in the axle already. I was thinking of sticking with a fresh set of those since it will be a part. I have wheeled the snot out of those on 31x10.x15's and now 32x11.50x15's.
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Unread 11-25-2011, 06:08 PM   #15
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That will be a strong 30.

Yes I have sleeved mine. I used pipe to keep it cheap, obviously 3" DOM would be better but more expensive. There are a few companies out there who make and sell sleeve kits now too.
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