Thanks...I understand what you are saying. Please post the answer when you find out from Johan. I will wait to order the gears until I find out how the speedo reads..

I'm planning on getting some different gears REALLY soon so it does matter. Of course if the speedo has nothing to do with the transmission, revolutions of the driveshaft, or rear end then it won't matter to the speedo. But...why does the program read the message if it is something offered and I'm ...

I haven't switched them yet. Why would it not matter? The speedo will certainly be off with a different gear vs. the stock 3.90, right? The same sorta situation as putting different size tires on the car...will throw the speedo off. The quick adjust allows a different tire size, but not ...

Anyone with an '09 SRT 6 speed tried to change the gear ratio on their predator and get a message that says, 'unable to change gear ratio'? I called diablosport and they couldn't figure out why it gives the error message. Any updates from Diablosport?? It's a simple adjustment in the 'quickadjust'...

Thanks for that

Anyone be willing to share their cooling fan temps for a 180 thermostat on a 6.1? I'd like to know what to put for all the settings?

I have the U7135 unit and when going to install it into my '09 Challenger SRT 6spd, I get a message to download something from the site here. It says calid: 68004308AD. Can anyone explain what's up?