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Unread 08-07-2013, 08:08 AM   #1
snsmith86
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Differential gears from 2010 Jeep in 2013?

I've been looking into re-gearing my differentials and found a lightly-used set of gears that came out of a 2010 Wrangler. Anyone know definitively if they will work in a 2013 Wrangler?

I know that that are both D30 front and D44 rear, but with the engine change from 3.8L to 3.6L Pentastar did Jeep do anything to the axles?

TIA!

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Unread 08-07-2013, 12:00 PM   #2
Tbasham
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Just the engine changed the axles did not. What gears do you have and what gears did you just recieve. I know with the D30 if you have 3.21 and want to go larger you will need to get a bigger carrier to support gears larger then 3.21
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Unread 08-07-2013, 12:08 PM   #3
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It CAN be done, but should it.....
They need to be inspected by a professional, and set by a professional to make sure the clearances and wear patterns are the same. Unless they are being given to you, I'd probably just invest in a quality brand of gears and be done with it.
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Unread 08-07-2013, 12:20 PM   #4
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Quote:
Originally Posted by Tbasham View Post
Just the engine changed the axles did not. What gears do you have and what gears did you just recieve. I know with the D30 if you have 3.21 and want to go larger you will need to get a bigger carrier to support gears larger then 3.21
I do have 3.21 gears and was thinking of buying someone else's 3.73 factory gears that were pulled out of a 2010. I didn't realize that a new carrier would be required, though. I've not re-geared before, but don't really want to go higher than 3.73 or 4.10 since my Jeep is a DD first, occasional wheeler second.
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Unread 08-07-2013, 12:25 PM   #5
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Originally Posted by Capper5016 View Post
It CAN be done, but should it.....
They need to be inspected by a professional, and set by a professional to make sure the clearances and wear patterns are the same. Unless they are being given to you, I'd probably just invest in a quality brand of gears and be done with it.
The gears I found were pulled out of a 2010 Jeep with less than 10K miles on them. I have no intention of doing it myself, but I thought since I really only want to go to 3.73, I might be able to find some OEM parts that someone else didn't want. However, I wouldn't be able to inspect before taking possession as it would be an internet transaction.

If I buy new aftermarket, what's a good brand? Dana Spicer I presume is the OEM, but I see others out there who I have no familiarity with (Crown, Alloy USA and G2 come to mind).

Thanks!
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Unread 08-07-2013, 12:35 PM   #6
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I would skip buying those, especially if you cant inspect them. With the 3.21 you have to replace the carrier as well....sucks.
As far as brand, I've used Alloy USA and they worked fine, a lot of people seem to like Yukon gears, and Dana Spicer is a highly thought of brand.
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Unread 08-07-2013, 12:42 PM   #7
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Two things I would do different. Purchase brand new gears and go with 4.10. The labor cost to go 3.21 to 3.73 isn't worth such a small difference.
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Unread 08-07-2013, 01:04 PM   #8
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Two things I would do different. Purchase brand new gears and go with 4.10. The labor cost to go 3.21 to 3.73 isn't worth such a small difference.
4.10 would be fine with me, but I don't really want to go to 4.56. The 3.6L engine has plenty of grunt right now with 3.21 gears and 32" tires, so I figured 3.73 and 33" tires would be a pretty nice setup for a DD...

Thanks!
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Unread 08-07-2013, 01:07 PM   #9
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Sure lets put used gears in a brand new jeep to save a hundred bucks in parts.
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Unread 08-07-2013, 01:13 PM   #10
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^ditto - not only is it dumb to do, but it has warranty implications if your JK is still covered. And,.....you should still use master install kits if you did do it, which will make the savings even smaller. If you do it yourself, assuming you have the experience and tools, might be the only route...the two shops I use would not install used parts as a matter of practice.
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Unread 08-07-2013, 01:57 PM   #11
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Fair enough...I won't be doing it myself, I don't have the tools or experience. When I get to the point of doing it, I may just end up buying the gears through the shop (not sure who is around here, that will be the next chore).

Thanks!
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Unread 08-07-2013, 05:00 PM   #12
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Quote:
Originally Posted by snsmith86 View Post
Fair enough...I won't be doing it myself, I don't have the tools or experience. When I get to the point of doing it, I may just end up buying the gears through the shop (not sure who is around here, that will be the next chore).

Thanks!
http://jeepspace.jeepforum.com/KrawlOff-Road

Hit up Krawl...they are a very respected vendor here. If they cant do it I'm sure than can point you in the right direction.
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Unread 08-07-2013, 07:58 PM   #13
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Quote:
Originally Posted by snsmith86 View Post
4.10 would be fine with me, but I don't really want to go to 4.56. The 3.6L engine has plenty of grunt right now with 3.21 gears and 32" tires, so I figured 3.73 and 33" tires would be a pretty nice setup for a DD...

Thanks!
I run 33's with 3.73 and wish I had a bit more gear, so I think if you're going to regear go 4.10's.
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Unread 08-07-2013, 09:43 PM   #14
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Purchase the gears from the shop that will do the install. You will have less problems with warranty if something were to go wrong and often your overall price is lower either by lower price on gears, lower labor, or both.
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Unread 08-07-2013, 09:58 PM   #15
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In all honesty, if the OP wanted to go with 3.73's and they are in good condition, I can't see what is wrong with buying a set of used gears. That is dependent on the previous setup having a suitable contact/wear pattern, no chips/drops/cracks in the teeth, buying a new carrier (carrier break is at 3.73 isn't it?) and changing out the bearings/races with new, clean ones. OEM Spicer gears are excellent quality - and perhaps the most expensive gears on the market (though most likely priced high just for the average consumer who doesn't change gears often). There are plenty of people who buy used gears and used axle assemblies and run them just fine - no matter what vehicle you are talking about. More important, in my mind, would be finding a reputable shop to install/set them up correctly - even brand a brand new Ring and Pinion won't save you from a shop that does ****ty regears. Just my $0.02.

That being said - if you are going to all the trouble in regearing, I'd agree that the OP should highly reflect on the gear charts with your chosen tire size in mind, what you're using the Jeep for, and (to a lesser degree) how important fuel economy is to you. I'd also consider going to 4.10's. I know that for myself - the next axle-swap I will be taking one step lower to 5.13's myself, but I'll also be running 37's!

In other news, I have my 3.73's hanging on the wall in my garage after I regeared my JK!
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