Is there a chart showing gear ratio and rpm's? Everytime I ask someone they come back with math equations and formulas for this. Does anyone know if there is a chart out for the new 2012 with the 5speed auto?

 

+1 I am interested in the numbers too. Thinking 4.56 gears in a 2012 auto unlimited with 35's.

 

Did they even find a workaround for gearing the 2012's yet? I thought it put the Jeep into a limp mode and it couldn't be driven?

 

Yup, 2012 guys have to wait for a while. AEV says end of September. Be patient.

 

I haven't seen a ready-made chart like the previous JKs have.
You can take the ratios below and plug them into one of the online gear calculators.

2012 Transmission Ratios

Manual
1st 4.46
2nd 2.61
3rd 1.72
4th 1.25
5th 1.00
6th 0.797
R 4.06

Automatic
1st 3.59
2nd 2.19
3rd 1.41
4th 1.00
5th 0.83
R 3.16

 

Thank you, ronjenx!

This is exactly the information I was looking for . . . and because of your post, I joined this Forum.

I just bought a 2012 Sahara with the auto transmission, and I'm looking forward to learning more about these great machines!


All best,
Joe