Upgrading Axle Shafts - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 11 Old 03-22-2017, 02:25 PM Thread Starter
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Upgrading Axle Shafts

I'm planning on upgrading to chromoly shafts, but it will be a few months between swapping the front and the rear's.

Which should I do first? Front or rear? I will be in Moab in three weeks and will do the other end when I return before the summer.


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post #2 of 11 Old 03-22-2017, 02:31 PM
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I would do the front shafts first. In my experience rear shaft breakage is less common than front shaft and U joint issues, and although you might bend a rear shaft flange you can still drive on a bent flange for a month or 2. I once did for 3 months.

Plus a broken front shaft is more likely imo, especially if you don't have a Rubicon.
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post #3 of 11 Old 03-22-2017, 02:32 PM
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I broke a front shaft first. And the people I know usually break the front way more often then the rear... It's usually the long side shaft too.
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post #4 of 11 Old 03-22-2017, 02:38 PM Thread Starter
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Thanks. It is a Rubicon. Sounds like the front it will be.


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post #5 of 11 Old 03-22-2017, 03:33 PM
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Or why not just carry trail spares? Why spend $1400 to prevent (maybe) a breakage when $300 could get you a spare shaft then up and running in a few minutes?

I have not personally broken an axle shaft since 97. I have however fixed many others on the trail. To me, I like fuses. 1310 u-joints are a great fuse and easy to replace. Stock axle shafts and axle u-joint are cheap insurance. One if the guys I run with has RCV shafts. Want to know what broke when he had his front axle bound up in the rocks? Ring gear. (2012 Rubicon 2 dr, 35s and 4.88 gears)
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post #6 of 11 Old 03-22-2017, 03:59 PM
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Quote:
Originally Posted by Rubi-8 View Post
Or why not just carry trail spares? Why spend $1400 to prevent (maybe) a breakage when $300 could get you a spare shaft then up and running in a few minutes?

I have not personally broken an axle shaft since 97. I have however fixed many others on the trail. To me, I like fuses. 1310 u-joints are a great fuse and easy to replace. Stock axle shafts and axle u-joint are cheap insurance. One if the guys I run with has RCV shafts. Want to know what broke when he had his front axle bound up in the rocks? Ring gear. (2012 Rubicon 2 dr, 35s and 4.88 gears)
But you get a set of cromos for 6 or 7 hundred and have your stockers as a trail spare .

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post #7 of 11 Old 03-22-2017, 04:10 PM Thread Starter
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Yes. I'm not going with RCV's. Ten Factory and keep the stock shafts as spares.


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post #8 of 11 Old 03-22-2017, 08:29 PM
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Only advantage to rear upgrade first is then you can carry the stock ones as spares. Break a front axle shaft, just remove it and plug the tube to keep oil in. Break a rear semi-float shaft and you're walking out.
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post #9 of 11 Old 03-23-2017, 05:30 AM
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I believe it was 2012 when they changed the u joint size on the front to 1350s. I would say the front are more likely to break, but given your trip i would be more worried about a rear shaft breaking because it won't be drive-able. A front shaft would only stop your wheeling, not your trip.


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post #10 of 11 Old 03-23-2017, 09:41 AM Thread Starter
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Well crap.

I'm on 37's, if it makes a difference.


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post #11 of 11 Old 03-23-2017, 10:00 AM
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Quote:
Originally Posted by Rubi-8 View Post
Or why not just carry trail spares? Why spend $1400 to prevent (maybe) a breakage when $300 could get you a spare shaft then up and running in a few minutes?

I have not personally broken an axle shaft since 97. I have however fixed many others on the trail. To me, I like fuses. 1310 u-joints are a great fuse and easy to replace. Stock axle shafts and axle u-joint are cheap insurance. One if the guys I run with has RCV shafts. Want to know what broke when he had his front axle bound up in the rocks? Ring gear. (2012 Rubicon 2 dr, 35s and 4.88 gears)
Until your cheap fuse breaks and you drive just a few more feet and the yokes catch and push the knuckle off

I broke a passenger side front RCV the other day and it was at the splines of the long shaft where it goes into the bell.
I heard a bang and thought it might of broken, but had to drive around on it for 5 minutes and then jack it up to work out what had really happened.

If I was the op I would definitely do the fronts first. Either chromo or RCV.
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