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Old 02-14-2012, 06:23 PM   #1
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Dana 30 4340 axles, is there a difference?

I'm doing a TON of upgrades to my Jeep right now and have a question about the upgraded Dana 30 axles. After much reading and research from this forum, I've decided to go with the 27 spline ARB locker in the Dana 30 and upgrade my front shafts. I made this decision based on several references to the weak point in the 27 spline front axles are the shafts themselves, not necessarily the spline count. There are several 4340 chromoly Dana 30 kits available from different vendors with different prices. For instance, I can purchase a Yukon 4340 kit with Splicer 760 joints for around $600 (local off road shop) with a lifetime warranty, or order a Nitro 4340 with Splicer 760 kit for $475 from East Coast Gear Supply with a listed 10 year warranty. I know it's only a $125 difference, but when your already up to several thousand in pending upgrades at the off road shop, every little bit helps! I have read opinions on other forums about American standard 4340 metal and imported 4340 metal not being the same. I know Yukon is made in America but I don't know about Nitro. I just know ECGS doesn't sell crappy products. I know several companies can get their 4340 from big name companies in the US and put their finishing touches on it. I would LOVE to save money here, is there a difference?

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Old 02-14-2012, 08:08 PM   #2
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I know Yukon is made in America...
I am about 99% sure all of Yukon's products are manufacturered overseas. I heard from a usually quite reliable source it is probably India. They do assembly here but I don't think any of their products are actually manufactured here. Did you price Superior Axle's Evolution Series axle shafts?

Hardened alloy 27 spline Dana 30 shafts will hold up very well to 35" tires and a locker.

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Old 02-14-2012, 09:07 PM   #3
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I am about 99% sure all of Yukon's products are manufacturered overseas. I heard from a usually quite reliable source it is probably India. They do assembly here but I don't think any of their products are actually manufactured here. Did you price Superior Axle's Evolution Series axle shafts?

Hardened alloy 27 spline Dana 30 shafts will hold up very well to 35" tires and a locker.
I haven't looked yet but I will check them out. I didn't know about the Yukon products. I always thought they were manufactured here. Thanks Mr Bransford once again for some expert insight!
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Old 02-14-2012, 09:30 PM   #4
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What made you decide to go with the upgraded 27 spline instead of the upgraded 30 spline?
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Old 02-14-2012, 10:10 PM   #5
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What made you decide to go with the upgraded 27 spline instead of the upgraded 30 spline?
I read several threads concerning the upgrade options, and several points were made that the weak point of the axles are the axles themselves not the splines. Another selling point was the fact that if you did have the upgraded 27 spline axles and you managed to break one, you can replace it with a stock 27 spline axle to get home. (Not to mention I found a new ARB locker on eBay for a killer price.)
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Old 02-15-2012, 12:32 AM   #6
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I read several threads concerning the upgrade options, and several points were made that the weak point of the axles are the axles themselves not the splines. Another selling point was the fact that if you did have the upgraded 27 spline axles and you managed to break one, you can replace it with a stock 27 spline axle to get home. (Not to mention I found a new ARB locker on eBay for a killer price.)
Not to mention that on the front axle, alloy 27 spline axle shafts will hold up to pretty much anything 35" tires and a locker can hand them. At least mine did that I installed into my previous TJ.
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Old 02-15-2012, 01:05 AM   #7
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What made you decide to go with the upgraded 27 spline instead of the upgraded 30 spline?
As boone stated, having a set of backups seems very appealing. I recently put an airlocker in my front diff, and I was feeling a little down about the fact that I didnt have money at the time to "upgrade" to 30 splines. After seeing a post about it a week or so ago though, having back up axles (even if they are the weaker factory ones) sounds very comforting to me. My buyers remorse is completely gone now and I would make the same decision over again if I had to.
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Old 02-16-2012, 03:17 AM   #8
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Good point. Unfortunately (yet at the same time im very fortunate just not in this case) my grandpa handed me down his TJ for my first car when he bought a new Rubi. It came with the 30 splines and ARB rear locker. Along with AEV wheels, Rancho Lift, tummy tuck, etc. and only 12k miles! im one lucky sperm

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