joe002

You going to get a chance to break them in before your long trip?

Sarathesahara

So i was wondering, and im sure its a dumb question, but are the front and rear axles the same gearing? (im considering buying the 5.13's for front and back, but if they are different i would like to get the appropriate set) I have a 09 sahara, no wheels or lift yet, but would like to have better response when im hauling for work.

Bosox5

Yep, when you regear, both axles must get the same gears. Buy the 5.13s for the d30 and d44.

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Sarathesahara

so what kind of change would i see if i were to leave the stock wheels on for a short time?

nthinuf

With an automatic, you'll be fine.

From the charts posted earlier in this thread:
An Auto with 5.13 and stock 32's = 2687 rpm @ 70mph
A 6spd rubicon runs 2614 rpm @ 70 straight from the factory.

Sarathesahara

I am running the 4.10's and run about 1950 rpm @ 70mph stock sahara 18's would the rom jump be the same?

nthinuf

I'm not sure what you are asking?


From the chart, an auto with:

4.10's and the optional 32" sahara tires (roughly 31" actual height?) would be at around 2150rpm @ 70mph.

4.10's with 35's (34" actual height) would be around 1950rpm @ 70mph.

Turning OD Off will bring the rpm's up to a more usable range for hills/winds/altitude/etc. To get that number, divide the OD On rpm's by .69

So, 4.10's with 34" tires = 1950. Divide by .69 = 2825rpm @70 with OD Off.

Sarathesahara

Awesome answer, thanks for the help!