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Unread 09-12-2013, 09:40 PM   #1
jenniferjeep
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gear ratio for Rubicon

What is the gear ratio for a stock Rubicon? Will they be ok for a 35" tire?

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Unread 09-12-2013, 10:20 PM   #2
HappyTrails
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4.10 is stock for a Rubicon.
No, you will not like it on 35's and 4.10's (if you know better).
If you have an automatic transmission, get 5.13's for 35's.
If you have a manual transmission, get 4.56 or better yet, 4.88's for 35's.

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Unread 09-12-2013, 11:20 PM   #3
suicideking
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Rubicons are available with 4.10 and 3.73. Most are 4.10 which is fine for 35's. I have the 3.73 and it's acceptable, but not ideal.
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Unread 09-12-2013, 11:20 PM   #4
AveCat
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People do run 35s on 4.10s tho. It won't be as nice as 4.88s or 5.13s but it does work.
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Unread 09-12-2013, 11:23 PM   #5
HappyTrails
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I had 4.10's on 32's...it was a dog, even for a Jeep!
JenniferJeep has the 3.8L engine...totally different animal than the 2012 (3.6L).
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Re-inventing the circle and straight line.
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Unread 09-12-2013, 11:24 PM   #6
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Quote:
Originally Posted by suicideking View Post
Rubicons are available with 4.10 and 3.73. Most are 4.10 which is fine for 35's. I have the 3.73 and it's acceptable, but not ideal.
Suicideking is running a different engine and drivetrain than the OP.

To JenniferJeep: You will not want to run 35's with 4.10 gears on your 2010 Rubicon.
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Unread 09-13-2013, 02:50 AM   #7
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5.38s all the way.
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Unread 09-13-2013, 06:42 AM   #8
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I run HEAVY 35's on mine with 4:10's. Superchip helps but yes, it is very piggy. Subscribed.
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Unread 09-13-2013, 08:24 AM   #9
jwmbishop
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I run 35s on my 2011 with 5.13 gears. Not bad but not best either - I have after gear remorse and wish I had gone with 5.38.

What I find amazing is the effect of tire weight. I have PitBulls on Raceline beadlocks for summer (offroad) and same size Hankoopk MTs on factory wheels for winter (on road) use. the pits are noticeably heavier than the Hankooks - VERY noticeable in off line response, freeway handling and road feedback. The unsprung weight of your suspension matters!

From 12 forward the Rubi has 3.73 or optional 4.10. BUT the pentastar is stronger at 1200 RPM and the transmission has a deeper 1st gear (both manual and automatic)
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Unread 09-13-2013, 10:43 AM   #10
panthermark
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2007 - current: 4.10's for all manuals.
2007 - 2011: 4.10's for automatics
2012 - current: 3.73's for automatics (4.10's are optional).

2010? Re-gear for 35's. 4.88's...maybe 5.13's..maybe deeper. Depends on if you have a stick or manual, if you have heavy wheels and armor, if you live near a lot of hills, ect...
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Unread 09-13-2013, 05:21 PM   #11
jenniferjeep
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What is an estimation of regearing cost?
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Unread 09-13-2013, 05:25 PM   #12
jenniferjeep
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Looking at the chart above the 4:10 is not even good for a 32" tire! The stock tires are 255/75 R17 which is about a 32" tire. Is that correct?
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Unread 09-13-2013, 05:42 PM   #13
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Quote:
Originally Posted by jenniferjeep View Post
Looking at the chart above the 4:10 is not even good for a 32" tire! The stock tires are 255/75 R17 which is about a 32" tire. Is that correct?
Yes, you are correct. 32's with 4.10's = sluggish. I had that setup in my Rubicon when it was stock. It was so bad that I was afraid to take the interstate because I could not accelerate quickly enough to merge with traffic.

A regear costs about $1000-2000 (parts and labor). Depends on where you live.
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2008 2-dr Rubicon, auto,
RK 2.5" Max Travel lift, Fox 2.0 shocks, 37" Nittos, 5.38's, River Raider skids, Warn VR8000-S.
RIPP Gen 2 Stg 2 Supercharger.
Re-inventing the circle and straight line.
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Unread 09-13-2013, 06:55 PM   #14
MikeHoncho88
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I'm running 35's with the 3.73's on my rubicon. It could be better, but it is not bad and definitely tolerable.
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Unread 09-13-2013, 07:04 PM   #15
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Quote:
Originally Posted by MikeHoncho88 View Post
I'm running 35's with the 3.73's on my rubicon. It could be better, but it is not bad and definitely tolerable.
*sigh*

Again... MikeHoncho is running a different engine and drivetrain than the original poster.
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