Is there anyone in the Bay Area that has a Pro Cal module I can use???

 

Just an FYI, the only way you can use it to change anything, is if the person letting you use it, has either never used it themselves or they have set the vehicle they used it on, back to factory settings. You can't change settings in one vehicle and then do another vehicle. It's in the programming.

 

Ok thanks! Didn't know! Close thread. Haha

 

. It's worth buying one. I thought the same thing until I found out. There are a few other things you can change. Now, with installing a winch, I will be able to change my idle. When I move to 37's, I'll use it then. It is worth the $150. Cheers!

 

Yep great investment,plus some have updates that can be loaded from your computer

 

Okay, cool.

From what I can tell (using a GPS/speedometer app) that I am anywhere from 3-5 mph off of what I am really going.

The Jeep thinks that I am going slower because it doesn't know that the tires are taking a longer time to rotate down the road. I'll fix you.

 

On 35s the speedo is off about 10%

 

I was skeptical to buy one. But I am glad I did.
I believe my Stability Control works better after programming correct size tires in. Its not just speedo.
I turned off that freakin TPMS.
And turned on Daytime Running Lights!

 

Hey,i remember you stranger

 

I really think I need to get one of these.

I feel that the Jeep is really lacking in power now and has a hard time accelerating. Is this normal when putting on bigger tires?