4.10 or 4.56 on a 2012 JK
Thread Starter
JK Newbie
Joined: Feb 2012
Posts: 8
Likes: 0
From: West Jefferson, Ohio
4.10 or 4.56 on a 2012 JK
2012 JK Automatic, 3" lift and 35" Nitto Trail grapplers. Anyone out there have a 2012 with a 4.56 gear in it? Just curious on the daily driveability RPM's at 65 etc. THANKS
JK Enthusiast
Joined: Aug 2010
Posts: 181
Likes: 0
From: Lantana, Texas, United States
Originally Posted by BAD 2012 JK
2012 JK Automatic, 3" lift and 35" Nitto Trail grapplers. Anyone out there have a 2012 with a 4.56 gear in it? Just curious on the daily driveability RPM's at 65 etc. THANKS
JK Enthusiast
Joined: Oct 2011
Posts: 140
Likes: 0
From: palmer,ak
Im running the nitto 35's on my 12 rubi with stock 4:10's and i noticed a huge loss in mpg's and 6th gear is only good on flat roads now. I would def. go with 4.56 or even lower. Just my 2 cents.
JK Freak
Joined: Jan 2012
Posts: 665
Likes: 0
From: corpus christi, tx
Originally Posted by smitty'
4.56 would be perfect. I have 4.88 with 37's that measure out @ 35.5 and I wish I had went 4.56. Rpm's @ 70 are about 2800.
JK Enthusiast
Joined: Sep 2011
Posts: 189
Likes: 0
From: Abingdon Md
I'm running the aev 3.5 lift and 35' s also and am only getting 14.8 mpg around town with 3.73's. I'm going to go with 4.56's in hopes that I will get better gas mileage
JK Enthusiast
Joined: Dec 2011
Posts: 163
Likes: 0
From: Grand Junction, CO
Hmmm. I'm running 315 duratracs and getting about 2400 rpms. That's at 75 mph. I reprogrammed with the aev . I know the tires run a little short of 35's. However I'm happy with the setup.
Trending Topics
JK Newbie
Joined: Mar 2012
Posts: 7
Likes: 0
From: michigan
i guess im wondering if you did just the tires and ran it without the reprogram to see the contrast.
thanks
JK Freak
Joined: Sep 2011
Posts: 856
Likes: 0
From: Mission viejo, ca
Originally Posted by Jackedup
I'm running the aev 3.5 lift and 35' s also and am only getting 14.8 mpg around town with 3.73's. I'm going to go with 4.56's in hopes that I will get better gas mileage
JK Enthusiast
Joined: Dec 2011
Posts: 152
Likes: 0
From: morgantown wv
Originally Posted by rb1boxer_3
Do you have a 2012 cause I wanted to run 37s too and was gonna go with 4.88 but now I'm really thinking 4.56.