2012 Regear!
JK Junkie
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
Sounds like a wheel speed sensor issue. Same thing happened on my Dodge Ram after a re-gear, when I would turn my programmer off. Should be addressable by a mismatch stock tire/gear set through the PCM. Unfortunately, that would take a trip to the dealer for the time being.
I'll do some quick math on what will work and it's important to remember that the automatics are now much like the manuals in terms of recommended gear sets while the Pentastar enters the torque band at 10-15% lower rpms.
I'll do some quick math on what will work and it's important to remember that the automatics are now much like the manuals in terms of recommended gear sets while the Pentastar enters the torque band at 10-15% lower rpms.
JK Newbie
Joined: Aug 2011
Posts: 39
Likes: 0
From: homestead, FL
Auto Vs. Manual
The Manual transmission would likely not be affected IMO but the new autos would.
I agree that the 6 spd and 4.10's would be about perfect with 35's and I am thinking that 4.56's with the auto will be about the same.
I agree that the 6 spd and 4.10's would be about perfect with 35's and I am thinking that 4.56's with the auto will be about the same.
JK Newbie
Joined: May 2011
Posts: 79
Likes: 0
From: Western Mass
Warning: Changing gears on a 2012 JK will cause it to go into limp mode.
2012 JK Wranglers now include the A580 transmission. With this new trans comes a new trans controller, and unfortunately this controller is programmed to put the vehicle into limp mode if it senses a change in gear ratio. Even a Jeep dealer cannot override this.
AEV has a fix for this and we are currently working on integrating it into our ProCal Module. In the meantime, we recommend that you hold off on changing the gears in any 2012s. We expect ProCals with the updated code to be available by the end of September.
2012 JK Wranglers now include the A580 transmission. With this new trans comes a new trans controller, and unfortunately this controller is programmed to put the vehicle into limp mode if it senses a change in gear ratio. Even a Jeep dealer cannot override this.
AEV has a fix for this and we are currently working on integrating it into our ProCal Module. In the meantime, we recommend that you hold off on changing the gears in any 2012s. We expect ProCals with the updated code to be available by the end of September.
Last edited by cmg; Sep 5, 2011 at 04:57 PM.
JK Enthusiast
Joined: Oct 2010
Posts: 116
Likes: 0
From: nunya, bidni
Originally Posted by cmg
I assuming this is only having an effect on people who have automatics then? Just one more reason why I'm glad I bought a standard