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Unread 05-13-2013, 06:14 AM   #1
lance-tek
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Wj gears 10/11 27 or 56 - Stumped?

I am trying to learn about the ring and pinion gears in an axle diff.

What I am really trying to figure out is what I should put in my WJ axles. I can't find a Dana 30 4:27 so, I think it's out of the running.

I am swapping my D35 for a D44a (and buying armor for it) and also regearing it to run 315-70-17s which will need at least a 4:10 on my WJ but maybe the 4:56 would be better for crawling and worse for the Highway?

What is the minute difference between the 4:10 and the 4:11 gears? Is it just the manufacturer spec or does it truly have an impact?

Thanks,

-lance

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Unread 05-13-2013, 06:31 AM   #2
Siva283
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Quote:
Originally Posted by lance-tek View Post
I am trying to learn about the ring and pinion gears in an axle diff.

What I am really trying to figure out is what I should put in my WJ axles. I can't find a Dana 30 4:27 so, I think it's out of the running.

I am swapping my D35 for a D44a (and buying armor for it) and also regearing it to run 315-70-17s which will need at least a 4:10 on my WJ but maybe the 4:56 would be better for crawling and worse for the Highway?

What is the minute difference between the 4:10 and the 4:11 gears? Is it just the manufacturer spec or does it truly have an impact?

Thanks,

-lance
There is not enough of a difference between 4.10 & 4.56 to justify it. You will not notice it. Go for 4.10 you will be happy with that.
The difference between 4.10 & 4.11 has to do with the size of the ring gear. The front dif is slightly smaller than the rear. A lot of vehicles come from the factory with 4.10 in the front and 4.11 in the rear. It won't cause any issues. It is only a 1 percent difference. You are safe as high as a 5 percent difference.

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[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 05-13-2013, 07:34 AM   #3
ratmonkey
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That tire is technically a 35. 4.10's will definitely not cut it in a 4.0 wj.
You want 4.88's.
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Unread 05-13-2013, 07:43 AM   #4
veiri86
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Quote:
Originally Posted by ratmonkey View Post
That tire is technically a 35. 4.10's will definitely not cut it in a 4.0 wj.
You want 4.88's.
X2

And when you buy the 4.10, few weeks later, you would wish if you bought the 4.56, so go right away to 4.56 or 4.88
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Unread 05-13-2013, 08:05 AM   #5
Siva283
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Quote:
Originally Posted by ratmonkey View Post
That tire is technically a 35. 4.10's will definitely not cut it in a 4.0 wj.
You want 4.88's.
My Bad I thought that worked out to a 33 inch tire. I also keep forgetting how my heavier my 01 WJ is than my YJ.
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 05-13-2013, 08:45 AM   #6
USFORCES
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I'm running 285/ 33 inch tires, Just waiting on 4.56 gears they should be be here any day
Talk to Kolak, He sells the nitro gears. "They are the highest quality forgings on the market the D44A sets are properly drilled for the 7/16" ring gear bolts used on the later WJs. They are the only ones that have 7/16" holes. Everybody else makes you use a funky adapter."
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Unread 05-13-2013, 08:49 AM   #7
lance-tek
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OK... now its between 4:56 and 4:88. At least I was able to rule out the 4:11
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Unread 05-13-2013, 09:22 AM   #8
veiri86
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Quote:
Originally Posted by lance-tek
OK... now its between 4:56 and 4:88. At least I was able to rule out the 4:11
I was on the same ship for long time till last week, then I went for 4.56, ordered the nitro ones, as almost everybody recommends them if you are planning to run 33
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Unread 05-13-2013, 09:37 AM   #9
Siva283
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Quote:
Originally Posted by lance-tek View Post
OK... now its between 4:56 and 4:88. At least I was able to rule out the 4:11
If you go 4.88 it will give you a little room to grow

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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 05-13-2013, 10:16 AM   #10
texlurch
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Keep in mind on the D30, 4:56 and 4:88 have tiny pinions. That will be your weak point.
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Unread 05-13-2013, 10:34 AM   #11
lance-tek
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Quote:
Originally Posted by texlurch View Post
Keep in mind on the D30, 4:56 and 4:88 have tiny pinions. That will be your weak point.
I'd love to swap the front but, I am learning as I go and I don't know how to modify anything to fit onto the WJ. I only have my garage to work in too (I have a HOA in my sub division too). If anyone is interested in helping me learn I'll gladly get better axles :-)
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Unread 05-13-2013, 10:42 AM   #12
skain8
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Originally Posted by texlurch View Post
Keep in mind on the D30, 4:56 and 4:88 have tiny pinions. That will be your weak point.
The small pinion will be the least of his problems.
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Unread 05-13-2013, 10:53 AM   #13
texlurch
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Originally Posted by skain8 View Post
The small pinion will be the least of his problems.
true, true.
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Unread 05-13-2013, 10:57 AM   #14
lance-tek
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Quote:
Originally Posted by skain8 View Post

The small pinion will be the least of his problems.
Can you elaborate on this statement for me? I'm pretty new to suspension/ drivetrains... ignorance is not bliss in this situation
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Unread 05-13-2013, 11:03 AM   #15
texlurch
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Stock axle'd D30's are "ok" up to a 32 in tire or so... for the average wheeler
Anything above that, and you really need to look at better axles, sleeves or trusses

Many people are running the stocker on 33/35 tires, and getting away with the occasional snapped CV..
You just have to be real, real easy on the skinny pedal.
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