Super 30/35 kit Yukon - JeepForum.com
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post #1 of 33 Old 08-15-2017, 06:57 PM Thread Starter
outnumbered3
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Super 30/35 kit Yukon

So I know what most are going to say but I would like to here some thoughts from you guys. I have 1999 TJ I6 Manual trans. I would like to step up to 35's and have the ablity to get Yukon Super 30 and 35 kit for next to nothing install only with gears. So my question is will the super 30/35 handle 35's (light to med) wheeling is all I do now. Who knows what the future holds for me. I know most well say hold out for a 44.I have found out 44's are hard to come by and when you do they are a lot of money and gone quick. I only need the housing for the 44 as I can also get supper 44 kit for install price only also.

I called Yukon and they said no problem with the super 30/35 handling 35's. I would like to here from people that have experience with this.


Or if someone that has a 44 rear housing lying around they want to sell me.

Thanks for the help.

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post #2 of 33 Old 08-15-2017, 07:26 PM
Jerry Bransford
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Generally speaking yes you'll be fine with 35's with a Super 35 but is that used Super 35 complete with its locker and are the axle shafts 30 spline?

Some "Super 35" kits aren't really true Super 35s, they include smaller diameter 27 splne shsfts. Real Super 35 kits come with a locker and 30 spline shafts.

The Dana 30 is already up to 35's, within reason. Stronger axle shafts become mandatory on a Dana 30 once a locker is added. Is that Super 30 complete with 30 spline shafts and locker?

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post #3 of 33 Old 08-15-2017, 10:11 PM Thread Starter
outnumbered3
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Thanks for the help. It will be brand new kit from yukon with their air lockers. it looks like theirs are 30 spline. so I should be fine I know someone in the industry that is giving me a great deal but all the off road shops are telling me dont wast my money on the 35 upgrades. thanks for the help.
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post #4 of 33 Old 08-16-2017, 12:19 AM
Jerry Bransford
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Sounds good you'll have zero problems with your 35's.

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post #5 of 33 Old 08-16-2017, 05:57 AM
XJ_jeepin_06
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I run a Super 35 and have zero problems on 32s. I would imagine if you're not trying to rock bounce you'll be fine on 35s.

Now for the front I would personally stay with 27 spline axles. Most of the time you'll snap the ujoint before the shaft. If you have 27 spline shafts you can carry your factory shafts as a spare or someone else in the group will likely carry a spare. With 30 Splines you will have a much harder time finding spares on the trail Just my thoughts.

1997 TJ. Red. 4.0/AX15/NP231 SSSYE. D30/S35. Lokka/E-Locker. 4.10s. RC2.5" JK Rubi Tires/Wheels.
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2000 2dr XJ D44HP/9in ARBs. 36" Iroks. Lots of skids/Lots of Damage. SOLD 6-6-2013
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post #6 of 33 Old 08-16-2017, 07:52 AM
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Quote:
Originally Posted by XJ_jeepin_06 View Post
I run a Super 35 and have zero problems on 32s. I would imagine if you're not trying to rock bounce you'll be fine on 35s.

Now for the front I would personally stay with 27 spline axles. Most of the time you'll snap the ujoint before the shaft. If you have 27 spline shafts you can carry your factory shafts as a spare or someone else in the group will likely carry a spare. With 30 Splines you will have a much harder time finding spares on the trail Just my thoughts.
I see these comments often about finding trail spares and always wonder why I should be looking to other people for my spares. If you think you need spare parts carry your own. I suppose if I broke the set of shafts I was running and then broke my set of spares on the same run then I would need to look for help from others, but that would be a rare occurrence IMO. The switch to 30 spline inners (stick to 27 spline outers) is a good move IMO. And 30 spline inners are actually pretty common on trail runs I'm on if I really did need help from someone else (in contrast to say a move like going to 35 spline rear shafts).
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post #7 of 33 Old 08-16-2017, 08:49 AM
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Originally Posted by biffgnar View Post
I see these comments often about finding trail spares and always wonder why I should be looking to other people for my spares. If you think you need spare parts carry your own. I suppose if I broke the set of shafts I was running and then broke my set of spares on the same run then I would need to look for help from others, but that would be a rare occurrence IMO. The switch to 30 spline inners (stick to 27 spline outers) is a good move IMO. And 30 spline inners are actually pretty common on trail runs I'm on if I really did need help from someone else (in contrast to say a move like going to 35 spline rear shafts).
Just addressing a possible con is all. I am normally the guy who others use for spares. I don't like having to find spare parts for my broken rig. I have broken a few sets of ten factory shafts and spicer ujoints. And a yukon shaft with CTMs. This is on 33s and a heavy xj. It was always the ears or ujoint to shatter. I haven't ran a super30. I also haven't wheeled with anyone that had a Super 30, which would mean if I ran a S30 I'd need to carry an extra set of chromo shafts, $$$.

1997 TJ. Red. 4.0/AX15/NP231 SSSYE. D30/S35. Lokka/E-Locker. 4.10s. RC2.5" JK Rubi Tires/Wheels.
Antirock.

2000 2dr XJ D44HP/9in ARBs. 36" Iroks. Lots of skids/Lots of Damage. SOLD 6-6-2013
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post #8 of 33 Old 08-16-2017, 08:54 AM
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Quote:
Originally Posted by biffgnar View Post
I see these comments often about finding trail spares and always wonder why I should be looking to other people for my spares. If you think you need spare parts carry your own. I suppose if I broke the set of shafts I was running and then broke my set of spares on the same run then I would need to look for help from others, but that would be a rare occurrence IMO. The switch to 30 spline inners (stick to 27 spline outers) is a good move IMO. And 30 spline inners are actually pretty common on trail runs I'm on if I really did need help from someone else (in contrast to say a move like going to 35 spline rear shafts).
Agreed. If you break 30 spline what's a stock shaft going to get you... 30 feet further before they break. I too know plenty of guys running 30-spline chromoly up front, both Dana 30 and Dana 44 and can't remember a time of them breaking.

I recall a number of 27-spline chromoly breakage in the last 15 years. And too many to remember stock shaft carnage both Dana 30s (u joints & shafts) and 44s (u-joints).

Chromoly shafts generally take care of the common u-joint failures.
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post #9 of 33 Old 08-16-2017, 09:19 AM
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Originally Posted by ftgiles View Post
Agreed. If you break 30 spline what's a stock shaft going to get you... 30 feet further before they break. I too know plenty of guys running 30-spline chromoly up front, both Dana 30 and Dana 44 and can't remember a time of them breaking.

I recall a number of 27-spline chromoly breakage in the last 15 years. And too many to remember stock shaft carnage both Dana 30s (u joints & shafts) and 44s (u-joints).

Chromoly shafts generally take care of the common u-joint failures.
About the same here. We switched over to the 30 spline inner fronts after a few hub breaks on the same rigs and then the inner would go. I much prefer to keep the breakage outside of the diff and we did and also very much slowed down outer failures at the same time.

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post #10 of 33 Old 10-01-2017, 12:42 PM
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Time to upgrade to Chromoly

I have a 99 TJ I6, 5 speed, ARBs, 30/44 axles, and put on 35s not long ago. I lock and unlock both lockers as needed on the trail and nearly never run the front lockers unless going straight. If I switch to chromoly shafts with reasonable driving (no bouncing on throttle) should that be sufficient? I have heard the D30 housing is prone to bending. Would the shafts avoid that? Is all chromoly the same? I see G2 has Gold shafts with 4340 chromoly. Is that an upgrade from other chromolys? Does one manufacturer have an advantage over another? Not expecting to ever go above 35s are there other weak points I should be thinking about? Will 30 spline shafts work without modifying anything else?
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post #11 of 33 Old 10-01-2017, 01:01 PM
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If you've made stock shafts live, you'll have no problem running chromoly shafts both front and rear. IN fact, I call it a mandatory upgrade when you offroad with lockers.

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post #12 of 33 Old 10-01-2017, 04:27 PM
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I ran a superior super 35 kit, with 33s, then 35s, then 36s.
With Spicer gears, set up right, never an issue, in over 100k miles.

I ran a front stock l.p. dana 30.
Spicer gears, stock shafts, Spicer joints with a lock rite.
Never broke anything.

After many years of running like that. The ujoints,were wearing out.
I replaced them with another set, and tacked the caps into the shafts.

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2005 rubicon sahara lj #592
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post #13 of 33 Old 10-01-2017, 04:30 PM
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Originally Posted by joe_jeep View Post
I ran a superior super 35 kit, with 33s, then 35s, then 36s.
With Spicer gears, set up right, never an issue, in over 100k miles.

I ran a front stock l.p. dana 30.
Spicer gears, stock shafts, Spicer joints with a lock rite.
Never broke anything.

After many years of running like that. The ujoints,were wearing out.
I replaced them with another set, and tacked the caps into the shafts.
You only needed to tack the front u-joint bearing caps into the ears because you're running the stock OE axle shafts. Replacing them with good quality aftermarket alloy shafts stops the bearing caps from pulling free from the axle shaft ears which stress/break with big tires like you ran.

When you have a choice, buy American made.
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post #14 of 33 Old 10-01-2017, 09:11 PM
AlmoStok
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So what is a "good, quality aftermarket shaft"? What brand, etc. do you recommend? I just need a 30 spline chromoly shaft for front D30 and rear D44 and no other modifications to fit them?
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post #15 of 33 Old 10-01-2017, 10:19 PM
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The G2 shafts have been excellent over the years and the price isn't bad either. If you'd like pricing, PM me here on the forum or email me at kolak@aol.com

Quote:
Originally Posted by AlmoStok View Post
So what is a "good, quality aftermarket shaft"? What brand, etc. do you recommend? I just need a 30 spline chromoly shaft for front D30 and rear D44 and no other modifications to fit them?

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