Swapping to 29 spline axles
Getting ready to regear to 4.88s and get a detroit locker in rear. Is it worth it to ditch my 27 spline rear axles in my 8.25 and move to 29's while I am at it?
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If you're getting a full case locker, get the 29 spline and grab a pair from the junk yard. Might as well go big spline wise so you're not regretting getting a 27 spline locker wishing you had gone up to 29 spline
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Originally Posted by Demonoid369
(Post 3263571)
If you're getting a full case locker, get the 29 spline and grab a pair from the junk yard. Might as well go big spline wise so you're not regretting getting a 27 spline locker wishing you had gone up to 29 spline
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Originally Posted by HYRYSC
(Post 3263574)
So the 29s are that much better? |
Originally Posted by unidentifiedbomb
(Post 3263578)
Yea. Unless you want to run basically a larger Dana 35 with a locker and money thrown at it to break on bigger tires.
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Yes do that swap for sure I run the 29 splines with my Detroit Locker and 35" tires. A pair of stock axles are cheap from the JY and I also carry spares as if something breaks I want it to be them and not locker or gears.
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2 splines aren't gonna make that axle break like a Dana 35. You still have a way larger ring and pinion in the 8.25. If you're swapping to full case locker then it can't hurt.
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Absolutely swap over now. Don't even consider buying a 27 spline Detroit. No reason to buy a weaker part over the price of a couple stock shafts.
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Originally Posted by XJlimitedx99
(Post 3263890)
Absolutely swap over now. Don't even consider buying a 27 spline Detroit. No reason to buy a weaker part over the price of a couple stock shafts.
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i concur ,you should do that swap. that way in the future go to 29 spline alloy shafts then you really getting close to bullet proof.
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Originally Posted by Rock Toy
(Post 3264231)
The stock 29 spline shafts are about 25% stronger than stock 27 spline shafts.
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Four Wheeler Jan, 2005
Originally Posted by RoyalXJ
(Post 3264282)
I would like to see evidence of this. Any testing done?
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Originally Posted by Rock Toy
(Post 3264327)
Axles 101 article: By Jim Alien page 60. I never just make stuff up, I twisted a tube and took out driveshaft u joint, but my 1541H shafts were fine.
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Originally Posted by RoyalXJ
(Post 3264331)
I wasn't asking about 1541 shafts. I'm talking about the 25% decrease in strength between a stock 29 spline shaft and a stock 27 spline shaft. That's a drastic decrease. Its kinda hard to believe for .04" difference in diameter between shafts.
I was giving the op an example of my experience with the1541H shafts. Which have an approximate 55% higher yield strength than standard 1040 carbon steel. |
Material wise the 1541h is only 25% stronger than 1040/1050 shafts. Most companies state that right on their websites. I'm not believing the 25% between stock shafts.
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