Has anyone ever found a tuner, program or method of successfully re-calibrating their WK2 to new tire size ? I have a 2018 JGC Trailhawk Ecodiesel and am upsizing from the stock 30.6 to a 32.1 tire (yes I am also changing the spare). After reading every thread I can find on this forum discussing this issue I still need help. Here is what I know
The 2018 have special security on the OBD port so the first step is to get around that.
That is supposed to be bypassed by a security gate module
found here :
https://zautomotive.com/product/bypass-module/
There is software from a company here that gives you access to lots of light and srt screen options, tire size talks ....but I can not find a confirmed response on a successful tire size change :
Appcar Jeep Grand Cherokee
I have had a suggestion that this Z Auto Item "Tazer" might be the solution, but the 3.0 Diesel is not an option when ordering, and I can't find anyone who claim to have done it successfully. They have a JL model that notates tire size and gear ratio changes but, I can't confirm it works for my MY18 WK2 EcoD. I emailed Z Auto twice. No answer.
https://zautomotive.com/product/tazer/
So as 1000's of forum users have upsized tires, I am hoping this finds someone who can verify and confirm the steps ?
I have seen a few people who used various methods/tools but were left with a constant ABS light on. I am looking for a method that does not create a constant error code......It's a simple number in a computer module, amazed that this is soo difficult. Who would ever imagine people might upsize tires on a jeep ?????
Thanks for any and all help.
The 2018 have special security on the OBD port so the first step is to get around that.
That is supposed to be bypassed by a security gate module
found here :
https://zautomotive.com/product/bypass-module/
There is software from a company here that gives you access to lots of light and srt screen options, tire size talks ....but I can not find a confirmed response on a successful tire size change :
Appcar Jeep Grand Cherokee
I have had a suggestion that this Z Auto Item "Tazer" might be the solution, but the 3.0 Diesel is not an option when ordering, and I can't find anyone who claim to have done it successfully. They have a JL model that notates tire size and gear ratio changes but, I can't confirm it works for my MY18 WK2 EcoD. I emailed Z Auto twice. No answer.
https://zautomotive.com/product/tazer/
So as 1000's of forum users have upsized tires, I am hoping this finds someone who can verify and confirm the steps ?
I have seen a few people who used various methods/tools but were left with a constant ABS light on. I am looking for a method that does not create a constant error code......It's a simple number in a computer module, amazed that this is soo difficult. Who would ever imagine people might upsize tires on a jeep ?????
Thanks for any and all help.
