Jeep Wrangler Forum banner

2013 JKU Ring and Pinion

1K views 8 replies 5 participants last post by  km58501 
#1 ·
I have a 2013 JKU with Dana30 front and Dana44 rear (Both open) at 3.21 factory ratio.

My plan is to install an ARB locker in the front and go to a 4.56 ratio.

My question is...can I install 4.56 gears on the rear Dana44 factory carrier?

I can't really afford to put a locker in rear end at this time. Thanks
 
#2 ·
Sorry to be the bearer of bad news, but not if you have 3.21's You will need a bigger carrier. 3.73 and up you would have been fine.
 
#3 ·
I am pretty sure the D44 3.21 carrier will be fine it just the front D30 that has the 3.54 break.
 
#5 ·
Really? First I have heard...

Carrier break: 2.72:1 – 3.73:1 and 3.92 – 5.89:1.

Dana 44 - Wikipedia, the free encyclopedia

Is there something different about the carrier in the D44 that the JK uses????
 
#6 ·
Wikipedia is often wrong :) Again I am relatively sure I am correct as I was going to do the same and did a lot of research and the dana/spicer supplier told me the break on the front D30 was 3.54 and the D44 was good to go.

I know for a fact wik is wrong on the 3.73 break right off the bat
 
#7 ·
Not one to post incorrect information and run.

From Spicer: http://www.spicerparts.com/sites/default/files/pdf/x5311-82013.pdf

The above PDF will show you (looking at the chart) that there is no break on the D44 in the JK. I didn't realize that the gears in the JK are cut thicker and can use the 3 series carrier on all gear ratios. Of course this is not true for D30. Also note that this is likely not true for non JK D44's (didn't research fully)

I learn something every day.
 
#8 ·
Just a word of warning..If you have an automatic, and decide to put a locker in the rear you CAN NOT use:

Detroit
Yukon Grizzly

These are auto lockers and will throw your tranny in to limp mode randomly. It happens during turns or going around corners when the auto locker rachets(locks and unlocks). confuses the TC and the tranny.

I had to switch to a selectable locker. The front doesnt matter due to the sensor config.
 
#9 ·
Thanks for the advice from all! And special thanks to gorillahydrographics for the warning about the rear lockers. I would likely get another ARB Air Locker for the rear if I do it at all. I am concerned about how the computer would handle it. For my use, I'm pretty sure I will leave the Dana 44 with just the new gears. Again Thanks
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top