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Old 02-09-2010, 10:10 AM   #1
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ARBs and alloys

So - I am working on my wish list for a big upgrade coming in the next month or two.

I am pretty sure on almost all of it:

Currie 4" lift
HP D30 (already have a D44 in the rear)
4.88:1 gears in both
SYE and TW driveshaft (and a 2-low upgrade while I am in there)
35" MTRs
Vanco brakes
Currie steering
maybe even a winch of some sort and cage upgrades

The Jeep is an '06 Unlimited with a 1" body lift and some good skid plate upgrades - but basically stock aside from that.

But there is one part that I am lost on. What to do for lockers and axle shafts. I am going to go with ARBs for sure. But since I am replacing the shafts and getting the new lockers, do I upgrade to the larger spline counts? Seems like an easy yes - no more cost and stronger. But here is my dilema. If I stick with the stock spline counts - I will have spare shafts to carry around with me. If I upgrade - I won't. So what is worth more, knowing you won't need spares - but not having them in that odd case you do, or being slightly more likely to need them and having them? I am only going to 35s, so not too big for a 30 and 44 on alloys. And I am not going to be out on the toughest of trails possible, but I would like to not worry.

Also - aside from the right ARB to handle the larger spline shafts - are there other things that need to be swapped for this part?

Thanks,

Eric

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Old 02-09-2010, 10:31 AM   #2
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First Eric, that's a very astute build you have planned. I wouldn't change a thing from what you have chosen, you have done your research well on everything on your list.

With just a little care during driving, that configuration has survived trips through Johnson Valley with upgraded alloy 27 spline shafts up front & alloy 30 spline shafts in the rear. I haven't broken my alloy 27/front & 30/rear shafts since upgrading them and they make it through Johnson Valley.

I only suggest you use quality American-made alloy upgrades like Superior Axle's Evolution Series and avoid the import shafts like Yukon uses.

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Old 02-09-2010, 10:37 AM   #3
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Thanks Jerry. Once that is all done - I can run Bronco Peak next time I am down in San Diego instead of just riding shotgun!

One question for you on this build list - is the HP D30 worth it, or just stick with what I have?

Here is the other thought on the upgrade spline count or have spares. How often will I actually remember to bring the spares along?
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Old 02-09-2010, 10:44 AM   #4
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The HP30 is definitely worth it. The R&P gears are stronger and you pick up needed additional extra ground clearance for the front driveshaft. I got high-centered a couple years ago on Pumpkin Eater at High-Desert Roundup on my front driveshaft (LP30) and 4WD magazine happened to catch it and show a pic of it... a great reason for HP30 vs. LP30.

On the higher spline count, I wouldn't worry about it unless you plan to be a regular out in JV. And even there not all TJ owners run higher spline counts though it's never a bad idea. If the added cost isn't a factor, I guess I'd upgrade to 30/33 though it's really unnecessary unless you plan to do JV a lot.
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Old 02-09-2010, 09:03 PM   #5
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Quote:
Originally Posted by Jerry Bransford View Post
I only suggest you use quality American-made alloy upgrades like Superior Axle's Evolution Series and avoid the import shafts like Yukon uses.
What do you think about Ten Factory by Motive Gear?
TEN Factory Performance Axle Shafts and Axle Kits

Are chromoly shafts necessary in a rear D44 with an ARB locker and 35s?
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